首页 > 最新文献

Cellular Polymers最新文献

英文 中文
Recent Developments in “Waterlily” Comfort Cushioning for the Flexible Slabstock Industry 柔性板材行业 "睡莲 "舒适缓冲装置的最新进展
IF 1.6 4区 医学 Q4 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2024-05-17 DOI: 10.1177/0262489319951401003
A. Parfondry, E. Cassidy
{"title":"Recent Developments in “Waterlily” Comfort Cushioning for the Flexible Slabstock Industry","authors":"A. Parfondry, E. Cassidy","doi":"10.1177/0262489319951401003","DOIUrl":"https://doi.org/10.1177/0262489319951401003","url":null,"abstract":"","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"23 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141060630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CONFERENCES AND SEMINARS 会议和研讨会
IF 1.6 4区 医学 Q4 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2024-05-17 DOI: 10.1177/0262489319951401006
{"title":"CONFERENCES AND SEMINARS","authors":"","doi":"10.1177/0262489319951401006","DOIUrl":"https://doi.org/10.1177/0262489319951401006","url":null,"abstract":"","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"1 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141060572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimization of natural rubber foams: Effect of foaming agent content and processing conditions on the cellular structure and mechanical properties 优化天然橡胶泡沫:发泡剂含量和加工条件对蜂窝结构和机械性能的影响
IF 1.6 4区 医学 Q4 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2024-03-21 DOI: 10.1177/02624893241241680
Ehsan Rostami-Tapeh-Esmaeil, Hibal Ahmad, Hossein Kazemi, Denis Rodrigue
In the past decades, natural rubber (NR) foams became popular in the automotive, construction and aerospace industries because of their lightweight, flexibility and shock-absorbing properties. The selection of optimal formulation and processing parameters is critical to produce foam with specific properties depending on the application. In this study, the effect of foaming agent concentration, foaming temperature and time on the morphological and mechanical properties of NR foams was investigated. First, increasing the foaming agent content from 5 to 9 phr (parts per hundred rubber) increased the cell size (16%), while decreasing the compression modulus (28%). In the second part, increasing the foaming temperature (145 to 155°C) resulted in larger cell size (163%); while decreasing the cell density (28%), compression modulus (2%), and hardness (1%). In the third part, increasing the foaming time (25 to 45 min) led to smaller cell size (63%) combined with higher cell density (100%), compression modulus (16%), and hardness (3%). Based on all the results obtained, the best NR foam was obtained with 7 phr of foaming agent and produced at 150°C for 35 min leading to superior morphological and mechanical performance: the smallest cell size (25 µm) and the most uniform cell size distribution ( Đ = 1.03) generating the highest compression modulus (3.36 MPa). Finally, the experimental compression results were combined to build a nonlinear regression model to optimize the formulation and processing conditions leading to 6.5 phr of OBSH molded at 150°C for 36 min. The model showed good agreement with a validation test with less than 2% deviation observed for both compression modulus and strength.
在过去的几十年里,天然橡胶(NR)泡沫因其轻质、柔韧和减震特性而在汽车、建筑和航空航天工业中大受欢迎。根据不同的应用,选择最佳配方和加工参数对于生产出具有特定性能的泡沫至关重要。本研究探讨了发泡剂浓度、发泡温度和时间对 NR 泡沫形态和机械性能的影响。首先,将发泡剂含量从 5 phr(百分之一的橡胶)增加到 9 phr(百分之一的橡胶),可增加泡孔尺寸(16%),同时降低压缩模量(28%)。在第二部分中,提高发泡温度(145 至 155°C)可增大电池尺寸(163%),同时降低电池密度(28%)、压缩模量(2%)和硬度(1%)。在第三部分中,增加发泡时间(25 至 45 分钟)可缩小细胞尺寸(63%),同时提高细胞密度(100%)、压缩模量(16%)和硬度(3%)。根据获得的所有结果,最好的 NR 泡沫是使用 7 phr 发泡剂并在 150°C 温度下生产 35 分钟后获得的,其形态和机械性能都非常出色:最小的细胞尺寸(25 微米)和最均匀的细胞尺寸分布(Đ = 1.03)产生了最高的压缩模量(3.36 兆帕)。最后,结合实验压缩结果建立了一个非线性回归模型,以优化配方和加工条件,从而在 150°C 的温度下成型 36 分钟,得到 6.5 phr 的 OBSH。该模型与验证试验显示出良好的一致性,压缩模量和强度的偏差均小于 2%。
{"title":"Optimization of natural rubber foams: Effect of foaming agent content and processing conditions on the cellular structure and mechanical properties","authors":"Ehsan Rostami-Tapeh-Esmaeil, Hibal Ahmad, Hossein Kazemi, Denis Rodrigue","doi":"10.1177/02624893241241680","DOIUrl":"https://doi.org/10.1177/02624893241241680","url":null,"abstract":"In the past decades, natural rubber (NR) foams became popular in the automotive, construction and aerospace industries because of their lightweight, flexibility and shock-absorbing properties. The selection of optimal formulation and processing parameters is critical to produce foam with specific properties depending on the application. In this study, the effect of foaming agent concentration, foaming temperature and time on the morphological and mechanical properties of NR foams was investigated. First, increasing the foaming agent content from 5 to 9 phr (parts per hundred rubber) increased the cell size (16%), while decreasing the compression modulus (28%). In the second part, increasing the foaming temperature (145 to 155°C) resulted in larger cell size (163%); while decreasing the cell density (28%), compression modulus (2%), and hardness (1%). In the third part, increasing the foaming time (25 to 45 min) led to smaller cell size (63%) combined with higher cell density (100%), compression modulus (16%), and hardness (3%). Based on all the results obtained, the best NR foam was obtained with 7 phr of foaming agent and produced at 150°C for 35 min leading to superior morphological and mechanical performance: the smallest cell size (25 µm) and the most uniform cell size distribution ( Đ = 1.03) generating the highest compression modulus (3.36 MPa). Finally, the experimental compression results were combined to build a nonlinear regression model to optimize the formulation and processing conditions leading to 6.5 phr of OBSH molded at 150°C for 36 min. The model showed good agreement with a validation test with less than 2% deviation observed for both compression modulus and strength.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"15 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Improved thermal and mechanical properties of water-blown rigid polyurethane foams synthesized with renewable castor oil and toluene diisocyanate-based trifunctional polyols 用可再生蓖麻油和甲苯二异氰酸酯基三功能多元醇合成的水吹硬质聚氨酯泡沫的热性能和力学性能的改善
4区 医学 Q4 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2023-09-01 DOI: 10.1177/02624893231204620
Vennila Srinivasan, Sumalatha Vasam, Sankar Govindarajan
In this work, glycerol was chemically modified into novel toluene diisocyanate (TDI) based trifunctional polyol (NTP) by a two step process, involving the reaction of TDI with glycerol to form an isocyanate-terminated pre-polymer, followed by the reaction with glycol. A thermal and mechanical property of water-blown rigid polyurethane foam (WB-PUF) was enhanced by the partial substitution (30 & 50 wt%) of castor oil with glycerol or synthesized NTP. The effects of glycerol content and NTP on the WB-PUF properties were investigated using various characterization techniques including ATR-FTIR, TGA, SEM, compression test, and Shore-A hardness test. Notably, the introduction of NTP substitution into the formulation of WB-PUF foams had beneficial impact on the structure of materials enhancing foam density from 77 kg/m 3 to 117 kg/m 3 and also exhibited superior thermal and mechanical properties compared to those with glycerol and unmodified foams. Shore A hardness and compression strength of those foams ranged from 50 to 69.5 °Sh A and 1.88-3.28 MPa, respectively. These findings suggest potential applications of the modified WB-PUF in areas such as rigid tissue engineering.
在这项工作中,通过两步工艺将甘油化学改性为新型甲苯二异氰酸酯(TDI)基三官能团多元醇(NTP),包括TDI与甘油反应形成异氰酸末端预聚物,然后与乙二醇反应。水吹硬质聚氨酯泡沫(WB-PUF)的热力学性能通过部分取代(30 &50 wt%)蓖麻油与甘油或合成NTP。通过ATR-FTIR、TGA、SEM、压缩测试和Shore-A硬度测试等多种表征技术,研究了甘油含量和NTP对WB-PUF性能的影响。值得注意的是,将NTP取代物引入到wh - puf泡沫的配方中,对材料的结构产生了有益的影响,将泡沫密度从77 kg/ m3提高到117 kg/ m3,并且与使用甘油和未改性泡沫相比,还表现出优越的热性能和机械性能。邵氏硬度为50 ~ 69.5°Sh A,抗压强度为1.88 ~ 3.28 MPa。这些发现提示了改性WB-PUF在刚性组织工程等领域的潜在应用。
{"title":"Improved thermal and mechanical properties of water-blown rigid polyurethane foams synthesized with renewable castor oil and toluene diisocyanate-based trifunctional polyols","authors":"Vennila Srinivasan, Sumalatha Vasam, Sankar Govindarajan","doi":"10.1177/02624893231204620","DOIUrl":"https://doi.org/10.1177/02624893231204620","url":null,"abstract":"In this work, glycerol was chemically modified into novel toluene diisocyanate (TDI) based trifunctional polyol (NTP) by a two step process, involving the reaction of TDI with glycerol to form an isocyanate-terminated pre-polymer, followed by the reaction with glycol. A thermal and mechanical property of water-blown rigid polyurethane foam (WB-PUF) was enhanced by the partial substitution (30 & 50 wt%) of castor oil with glycerol or synthesized NTP. The effects of glycerol content and NTP on the WB-PUF properties were investigated using various characterization techniques including ATR-FTIR, TGA, SEM, compression test, and Shore-A hardness test. Notably, the introduction of NTP substitution into the formulation of WB-PUF foams had beneficial impact on the structure of materials enhancing foam density from 77 kg/m 3 to 117 kg/m 3 and also exhibited superior thermal and mechanical properties compared to those with glycerol and unmodified foams. Shore A hardness and compression strength of those foams ranged from 50 to 69.5 °Sh A and 1.88-3.28 MPa, respectively. These findings suggest potential applications of the modified WB-PUF in areas such as rigid tissue engineering.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135588399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detailed investigation on the insulation and permeability characteristics of rigid polyurethane foam loaded with micron-sized Turkey feather powder depending on the free volume change 微米级火鸡羽毛粉加载硬质聚氨酯泡沫材料的保温渗透特性随自由体积变化的详细研究
4区 医学 Q4 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2023-09-01 DOI: 10.1177/02624893231204773
Ugur SOYKAN, Sedat CETIN, Ugur YAHSI
This study brokes new ground to understand the insulation and permeability performances of rigid polyurethane foams (RPUFs) containing the different contents of micron-sized turkey feather powders (TFPs) depending on the free volume change for the first time. The effects of TFPs loading on the RPUFs were investigated by the examination of their structural and chemical features (particle size and ATR-FTIR analyses), free volume property (PALS analysis), insulation features (thermal conductivity and sound absorption tests), permeability performance (air and water vapor permeability tests) and cellular topology (SEM). PALS analysis results revealed that the addition of TFPs into the foams led to the sharp decrease in all free volume parameters since TFPs caused the formation of the disordered cells by occupying the holes in the matrix. Furthermore, both thermal conductivity and acoustic performance of the resulting foams get worse when compared to unfilled RPUF. This results were attributed to the formation of thinner and weaker cells during polymerization, reduction in the amount of CO 2 inside the cells, enhancement in the solid-phase level in the matrix due to the increasing of volumetric density. Additionally, the foam samples with high content of TFPs showed considerably lower air and water vapor permeabilities when compared to neat RPUFs due to the dominant hydrophobic character of the keratin and reduction in the degree of vacancies in the matrix. SEM analysis also revealed that TFPs showed good compatibility with RPUF, but the distorted and irregular shaped cellular morphology was obtained at high contents.
本研究首次为了解不同微米级火鸡羽毛粉(tfp)含量的硬质聚氨酯泡沫塑料(RPUFs)的保温和渗透性能随自由体积变化的变化开辟了新的领域。通过检查其结构和化学特征(粒度和ATR-FTIR分析),自由体积特性(PALS分析),绝缘特性(导热性和吸声测试),渗透性性能(空气和水蒸气渗透性测试)和细胞拓扑结构(SEM)来研究tfp加载对rpuf的影响。PALS分析结果表明,在泡沫中加入tfp会导致泡沫中自由体积参数的急剧下降,这是由于tfp通过占据基质中的孔洞导致无序细胞的形成。此外,与未填充的RPUF相比,所得泡沫的导热性和声学性能都变差了。这一结果归因于在聚合过程中形成的更薄更弱的细胞,细胞内CO 2的数量减少,由于体积密度的增加,基质中固相水平的提高。此外,高tfp含量的泡沫样品的空气和水蒸气渗透性明显低于整齐的rpuf,这是由于角蛋白的主要疏水性和减少了基质中的空位程度。SEM分析也表明,tfp与RPUF具有良好的相容性,但含量高时细胞形态扭曲、不规则。
{"title":"Detailed investigation on the insulation and permeability characteristics of rigid polyurethane foam loaded with micron-sized Turkey feather powder depending on the free volume change","authors":"Ugur SOYKAN, Sedat CETIN, Ugur YAHSI","doi":"10.1177/02624893231204773","DOIUrl":"https://doi.org/10.1177/02624893231204773","url":null,"abstract":"This study brokes new ground to understand the insulation and permeability performances of rigid polyurethane foams (RPUFs) containing the different contents of micron-sized turkey feather powders (TFPs) depending on the free volume change for the first time. The effects of TFPs loading on the RPUFs were investigated by the examination of their structural and chemical features (particle size and ATR-FTIR analyses), free volume property (PALS analysis), insulation features (thermal conductivity and sound absorption tests), permeability performance (air and water vapor permeability tests) and cellular topology (SEM). PALS analysis results revealed that the addition of TFPs into the foams led to the sharp decrease in all free volume parameters since TFPs caused the formation of the disordered cells by occupying the holes in the matrix. Furthermore, both thermal conductivity and acoustic performance of the resulting foams get worse when compared to unfilled RPUF. This results were attributed to the formation of thinner and weaker cells during polymerization, reduction in the amount of CO 2 inside the cells, enhancement in the solid-phase level in the matrix due to the increasing of volumetric density. Additionally, the foam samples with high content of TFPs showed considerably lower air and water vapor permeabilities when compared to neat RPUFs due to the dominant hydrophobic character of the keratin and reduction in the degree of vacancies in the matrix. SEM analysis also revealed that TFPs showed good compatibility with RPUF, but the distorted and irregular shaped cellular morphology was obtained at high contents.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134995303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigating the role and impact of N2 as a blowing agent in the fabrication of thermoplastic polyurethane foams 研究了N2作为发泡剂在热塑性聚氨酯泡沫制造中的作用和影响
4区 医学 Q4 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2023-09-01 DOI: 10.1177/02624893231203376
Raghavendrakumar Rangappa, Shu-Kai Yeh
Fabricating low-density elastomeric foams with a homogenous cell structure has been challenging because of foam shrinkage. The low modulus of the elastomers and the high diffusivity of blowing agents lead to foam shrinkage and poor surface quality. Using N 2 as a physical blowing agent (PBA) is an eco-friendly foaming method to overcome foam shrinkage. In this study, PTMEG-MDI/BD-based TPU with a hardness of 85A, 90A, and 95A were foamed using N 2 . Nitrogen as a blowing agent created a homogeneous cell structure with an expansion ratio of more than five times, an average cell size of less than 25 μm, and a cell density of more than 10 9 cells/cm 3 . The shrinkage ratio and cellular morphology of CO 2 - and N 2 -blown TPU foam were compared at their maximum expansion ratio. At the maximum expansion ratio, the N 2 -blown foams exhibited a fine cell structure with a shrinkage ratio of less than 4%. However, the CO 2 -blown TPU foam showed a shrinkage ratio of 12.7% with significant cracks in the sample. The results demonstrate that using N 2 as a blowing agent can achieve an expansion ratio similar to that of CO 2 -blown foam, and the shrinkage problems of elastomeric foams can be significantly eliminated, which may help to maintain the physical properties of the foam.
由于泡沫收缩,制造具有均匀孔结构的低密度弹性体泡沫一直具有挑战性。弹性体的低模量和发泡剂的高扩散率导致泡沫收缩和表面质量差。使用n2作为物理发泡剂(PBA)是一种克服泡沫收缩的环保发泡方法。本研究以硬度为85A、90A和95A的PTMEG-MDI/ bd基TPU为材料,采用n2发泡。以氮气为发泡剂制备的晶胞结构均匀,膨胀率在5倍以上,平均晶胞尺寸小于25 μm,晶胞密度大于109 cells/ cm3。比较了CO 2和N 2吹制的TPU泡沫在最大膨胀比下的收缩率和细胞形态。在最大膨胀比下,氮气吹制的泡沫具有良好的孔状结构,收缩率小于4%。而co2吹制的TPU泡沫的收缩率为12.7%,试样中有明显的裂纹。结果表明,以n2为发泡剂可获得与co2吹制泡沫相似的膨胀比,可显著消除弹性体泡沫的收缩问题,有利于保持泡沫的物理性能。
{"title":"Investigating the role and impact of N<sub>2</sub> as a blowing agent in the fabrication of thermoplastic polyurethane foams","authors":"Raghavendrakumar Rangappa, Shu-Kai Yeh","doi":"10.1177/02624893231203376","DOIUrl":"https://doi.org/10.1177/02624893231203376","url":null,"abstract":"Fabricating low-density elastomeric foams with a homogenous cell structure has been challenging because of foam shrinkage. The low modulus of the elastomers and the high diffusivity of blowing agents lead to foam shrinkage and poor surface quality. Using N 2 as a physical blowing agent (PBA) is an eco-friendly foaming method to overcome foam shrinkage. In this study, PTMEG-MDI/BD-based TPU with a hardness of 85A, 90A, and 95A were foamed using N 2 . Nitrogen as a blowing agent created a homogeneous cell structure with an expansion ratio of more than five times, an average cell size of less than 25 μm, and a cell density of more than 10 9 cells/cm 3 . The shrinkage ratio and cellular morphology of CO 2 - and N 2 -blown TPU foam were compared at their maximum expansion ratio. At the maximum expansion ratio, the N 2 -blown foams exhibited a fine cell structure with a shrinkage ratio of less than 4%. However, the CO 2 -blown TPU foam showed a shrinkage ratio of 12.7% with significant cracks in the sample. The results demonstrate that using N 2 as a blowing agent can achieve an expansion ratio similar to that of CO 2 -blown foam, and the shrinkage problems of elastomeric foams can be significantly eliminated, which may help to maintain the physical properties of the foam.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135388944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanical and thermal properties of polyvinyl acetate foams reinforced with biopolymers 生物聚合物增强聚乙酸乙烯酯泡沫的力学和热性能
IF 1.6 4区 医学 Q4 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2023-07-31 DOI: 10.1177/02624893231193501
M. E. Ergun, E. Ozen, N. Yildirim, Berk Dalkilic, Ergun Baysal
The study developed and designed polyvinyl acetate (PVAc) foams using advanced freeze-drying technology, which exhibited good heat-insulating ability, flame retardancy, and mechanical properties. Different combinations of bleach kraft pulp, water-soluble chitosan, and zinc borate were used to reinforce the foams. The foams exhibited desirable compression and flexural properties, with compression strength and compression modulus ranging from 0.01 MPa to 0.08 MPa and 0.05 MPa to 0.29 MPa, respectively, while flexural strength and flexural modulus ranged from 0.12 MPa to 5.37 MPa and 9.86 MPa to 260,85 MPa, respectively. The use of zinc borate as a reinforcement resulted in improved thermal properties and reduced mass loss at 600°C by 20.69%. Thermal conductivity tests indicated that the foams had low thermal conductivity values ranging from 0.037 W/mK to 0.074 W/mK. The foams with zinc borate (60  g/L) and high molecular weight water-soluble chitosan (70  g/L) reinforcement exhibited high limiting oxygen index (LOI) of 28.72%. Overall, the results suggest that the PVAc foams could serve as a promising sustainable alternative in thermal insulation and construction fields.
采用先进的冷冻干燥技术开发设计了具有良好隔热性能、阻燃性能和力学性能的聚醋酸乙烯酯(PVAc)泡沫材料。用漂白硫酸盐浆、水溶性壳聚糖和硼酸锌的不同组合来增强泡沫。泡沫材料具有良好的抗压和抗弯性能,抗压强度和抗压模量分别为0.01 MPa ~ 0.08 MPa和0.05 MPa ~ 0.29 MPa,抗弯强度和抗弯模量分别为0.12 MPa ~ 5.37 MPa和9.86 MPa ~ 260、85 MPa。使用硼酸锌作为增强剂可以改善热性能,并将600℃时的质量损失降低20.69%。导热系数测试表明,泡沫的导热系数较低,范围为0.037 ~ 0.074 W/mK。硼酸锌(60 g/L)和高分子量水溶性壳聚糖(70 g/L)增强泡沫的极限氧指数(LOI)较高,为28.72%。综上所述,研究结果表明,聚氯乙烯泡沫材料在保温和建筑领域具有良好的可持续发展前景。
{"title":"Mechanical and thermal properties of polyvinyl acetate foams reinforced with biopolymers","authors":"M. E. Ergun, E. Ozen, N. Yildirim, Berk Dalkilic, Ergun Baysal","doi":"10.1177/02624893231193501","DOIUrl":"https://doi.org/10.1177/02624893231193501","url":null,"abstract":"The study developed and designed polyvinyl acetate (PVAc) foams using advanced freeze-drying technology, which exhibited good heat-insulating ability, flame retardancy, and mechanical properties. Different combinations of bleach kraft pulp, water-soluble chitosan, and zinc borate were used to reinforce the foams. The foams exhibited desirable compression and flexural properties, with compression strength and compression modulus ranging from 0.01 MPa to 0.08 MPa and 0.05 MPa to 0.29 MPa, respectively, while flexural strength and flexural modulus ranged from 0.12 MPa to 5.37 MPa and 9.86 MPa to 260,85 MPa, respectively. The use of zinc borate as a reinforcement resulted in improved thermal properties and reduced mass loss at 600°C by 20.69%. Thermal conductivity tests indicated that the foams had low thermal conductivity values ranging from 0.037 W/mK to 0.074 W/mK. The foams with zinc borate (60  g/L) and high molecular weight water-soluble chitosan (70  g/L) reinforcement exhibited high limiting oxygen index (LOI) of 28.72%. Overall, the results suggest that the PVAc foams could serve as a promising sustainable alternative in thermal insulation and construction fields.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"1 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47727941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Influence of sodium-montmorillonite nanoclay on flammability, thermal stability, morphology, and mechanical properties of rigid water-blown palm oil-based polyurethane foam 钠蒙脱土纳米粘土对棕榈油基硬质水吹聚氨酯泡沫材料的可燃性、热稳定性、形态和力学性能的影响
IF 1.6 4区 医学 Q4 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2023-03-01 DOI: 10.1177/02624893231193499
M. H. Dzulkifli, R. A. Majid, M. Yahya
This paper presents the experimental works on rigid palm oil-based polyurethane (PU) foam reinforced with sodium-montmorillonite (Na-MMT). Filler loading was varied between 1 and 10 wt %., and the obtained foam was characterized for its combustibility, morphology, thermal stability, and mechanical response. Exfoliated clay microstructure was exhibited at lower Na-MMT loadings. Addition of nanoclay into the PU foam failed to impart any discernable improvement with regards to its flammability, believed due to stronger influence of low-functionality palm oil polyol used. Apparent improvement in thermal stability was observed at low clay amounts. Foam with finer cell size was obtained in the presence of Na-MMT, however only until a certain loading limit. Compressive strength generally increases with increasing clay content, but after 3 wt % the property deteriorated. Peculiarly, compressive strength rose again at 5 wt % and 6 wt % – postulated due to additional load-bearing effect of ‘integral skin’ – before plummeting back again beyond this value.
本文介绍了用钠蒙脱土(Na-MMT)增强棕榈油基聚氨酯(PU)刚性泡沫的实验研究。填料的装载量在1 - 10 wt %之间变化。所得泡沫的可燃性、形态、热稳定性和力学响应进行了表征。在较低的Na-MMT加载下,粘土的微观结构呈现出剥离。在聚氨酯泡沫中添加纳米粘土并没有给其可燃性带来任何明显的改善,这可能是由于所使用的低功能棕榈油多元醇的影响更大。在低粘土量下观察到热稳定性的明显改善。在Na-MMT存在的情况下,泡沫具有更细的孔尺寸,但只有在一定的载荷限制下才能得到。抗压强度一般随粘土含量的增加而增加,但超过3wt %后性能变差。特别的是,抗压强度在5 wt %和6 wt %时再次上升(假设是由于“整体表皮”的额外承重作用),然后再次下降到超过这个值。
{"title":"Influence of sodium-montmorillonite nanoclay on flammability, thermal stability, morphology, and mechanical properties of rigid water-blown palm oil-based polyurethane foam","authors":"M. H. Dzulkifli, R. A. Majid, M. Yahya","doi":"10.1177/02624893231193499","DOIUrl":"https://doi.org/10.1177/02624893231193499","url":null,"abstract":"This paper presents the experimental works on rigid palm oil-based polyurethane (PU) foam reinforced with sodium-montmorillonite (Na-MMT). Filler loading was varied between 1 and 10 wt %., and the obtained foam was characterized for its combustibility, morphology, thermal stability, and mechanical response. Exfoliated clay microstructure was exhibited at lower Na-MMT loadings. Addition of nanoclay into the PU foam failed to impart any discernable improvement with regards to its flammability, believed due to stronger influence of low-functionality palm oil polyol used. Apparent improvement in thermal stability was observed at low clay amounts. Foam with finer cell size was obtained in the presence of Na-MMT, however only until a certain loading limit. Compressive strength generally increases with increasing clay content, but after 3 wt % the property deteriorated. Peculiarly, compressive strength rose again at 5 wt % and 6 wt % – postulated due to additional load-bearing effect of ‘integral skin’ – before plummeting back again beyond this value.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"42 1","pages":"140 - 155"},"PeriodicalIF":1.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46901886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced effect of chloroprene on the mechanical properties of polyurethane foams 氯丁二烯对聚氨酯泡沫力学性能的增强作用
IF 1.6 4区 医学 Q4 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2023-03-01 DOI: 10.1177/02624893231191258
Masoumeh Hosseinpour, H. R. Ashjari, M. S. Seyed dorraji, M. Rastgouy-Houjaghan, Sheida Faraji
In this research, a new method to increase the mechanical properties of the low-density polyurethane foams (PUFS) has been described. Chloroprene rubber (CR) is used as reinforcing the mechanical properties of the foam. Polyurethane foam (PUF) containing CR (PUF/CR) and pure PUF were characterized by mechanical testing, Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Differential scanning calorimeter (DSC), Thermogravimetric analysis (TGA). The results of mechanical properties show the tensile strength of PUFS containing 0, 1, 2, 3, 4 and 5 wt% CR are 38.2, 42, 56.4, 61.48, 77.3 and 77.18 kPa, respectively. Also the morphological studies show by increasing the amount of CR in the foam structure, the foam cells are smaller and more closed. Graphical Abstract
在本研究中,介绍了一种提高低密度聚氨酯泡沫(PUFS)力学性能的新方法。氯丁橡胶(CR)用于增强泡沫的机械性能。采用力学性能测试、傅立叶变换红外光谱(FT-IR)、扫描电子显微镜(SEM)、差示扫描量热仪(DSC)、热重分析(TGA)对含有CR(PUF/CR)和纯PUF的聚氨酯泡沫塑料(PUF)进行了表征。力学性能结果表明,含有0、1、2、3、4和5wt%CR的PUFS的拉伸强度分别为38.2、42、56.4、61.48、77.3和77.18kPa。形态学研究还表明,通过增加泡沫结构中CR的量,泡沫细胞更小、更封闭。图形摘要
{"title":"Enhanced effect of chloroprene on the mechanical properties of polyurethane foams","authors":"Masoumeh Hosseinpour, H. R. Ashjari, M. S. Seyed dorraji, M. Rastgouy-Houjaghan, Sheida Faraji","doi":"10.1177/02624893231191258","DOIUrl":"https://doi.org/10.1177/02624893231191258","url":null,"abstract":"In this research, a new method to increase the mechanical properties of the low-density polyurethane foams (PUFS) has been described. Chloroprene rubber (CR) is used as reinforcing the mechanical properties of the foam. Polyurethane foam (PUF) containing CR (PUF/CR) and pure PUF were characterized by mechanical testing, Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Differential scanning calorimeter (DSC), Thermogravimetric analysis (TGA). The results of mechanical properties show the tensile strength of PUFS containing 0, 1, 2, 3, 4 and 5 wt% CR are 38.2, 42, 56.4, 61.48, 77.3 and 77.18 kPa, respectively. Also the morphological studies show by increasing the amount of CR in the foam structure, the foam cells are smaller and more closed. Graphical Abstract","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"42 1","pages":"174 - 184"},"PeriodicalIF":1.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43183041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of small amount of functionalized multi-walled carbon nanotubes on the properties of rigid polyisocyanurate and polyurethane foam composites 少量功能化多壁碳纳米管对硬质聚异氰脲酸酯和聚氨酯泡沫复合材料性能的影响
IF 1.6 4区 医学 Q4 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2023-03-01 DOI: 10.1177/02624893231191838
R. Vlasov, D. Ryabova, Sakina Zeynalova, Marcel Nazmutdinov, Sergey Ryabov
Using small amounts of multi-walled carbon nanotubes (MWCNTs) functionalized with carboxyl groups, methyldiethanolamine and triethanolamine (from 0.005 to 0.1%), a series of rigid composite polyurethane-polyisocyanurate (PIR) and polyurethane (PUR) foams was obtained. The influence of these additives on the morphology of the cellular structure of the synthesized foams, as well as the change in their physical-mechanical and thermophysical characteristics, was analyzed. The effect of additions of functionalized MWCNTs on the change in compressive strength, Young’s modulus, thermal conductivity index, and mass loss during combustion of the synthesized foams has been studied. Based on the results obtained, the introduction of small amounts (up to 0.05%) of functionalized nanotubes in the foam composition improves the characteristics described above. The greatest effect was achieved using 0.05% carboxylated MWCNTs functionalized with triethanolamine.
采用少量羧基、甲基二乙醇胺和三乙醇胺(0.005 ~ 0.1%)功能化的多壁碳纳米管(MWCNTs),制备了一系列刚性复合聚氨酯-聚异氰脲酸酯(PIR)和聚氨酯(PUR)泡沫。分析了这些添加剂对合成泡沫的细胞结构形态的影响,以及它们的物理力学和热物理特性的变化。研究了功能化MWCNTs的加入对合成泡沫的抗压强度、杨氏模量、导热系数和燃烧过程中质量损失的影响。根据所获得的结果,在泡沫组合物中引入少量(高达0.05%)功能化纳米管可以改善上述特性。使用三乙醇胺功能化的0.05%羧化MWCNTs效果最好。
{"title":"Effect of small amount of functionalized multi-walled carbon nanotubes on the properties of rigid polyisocyanurate and polyurethane foam composites","authors":"R. Vlasov, D. Ryabova, Sakina Zeynalova, Marcel Nazmutdinov, Sergey Ryabov","doi":"10.1177/02624893231191838","DOIUrl":"https://doi.org/10.1177/02624893231191838","url":null,"abstract":"Using small amounts of multi-walled carbon nanotubes (MWCNTs) functionalized with carboxyl groups, methyldiethanolamine and triethanolamine (from 0.005 to 0.1%), a series of rigid composite polyurethane-polyisocyanurate (PIR) and polyurethane (PUR) foams was obtained. The influence of these additives on the morphology of the cellular structure of the synthesized foams, as well as the change in their physical-mechanical and thermophysical characteristics, was analyzed. The effect of additions of functionalized MWCNTs on the change in compressive strength, Young’s modulus, thermal conductivity index, and mass loss during combustion of the synthesized foams has been studied. Based on the results obtained, the introduction of small amounts (up to 0.05%) of functionalized nanotubes in the foam composition improves the characteristics described above. The greatest effect was achieved using 0.05% carboxylated MWCNTs functionalized with triethanolamine.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"42 1","pages":"123 - 139"},"PeriodicalIF":1.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45879381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Cellular Polymers
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1