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Thermal and physico-mechanical properties of biodegradable materials based on polyhydroxyalkanoates 聚羟基烷酸酯生物可降解材料的热物理力学性能
IF 1.6 4区 工程技术 Q4 POLYMER SCIENCE Pub Date : 2023-01-02 DOI: 10.14314/polimery.2022.11.3
Igor Semeniuk, V. Kochubei, E. Karpenko, Y. Melnyk, V. Skorokhoda, N. Semenyuk
Thermal and physico-mechanical properties of polyhydroxyalkanoates of Rhodococcus erythropolis Au-1, Pseudomonas sp. PS-17, Azotobacter vinelandii N-15 and polyhydroxybutyrate/polylactide mixtures were identified. Modifying polyhydroxybutyrate with polylactide improves physical and mechanical characteristics such as heat resistance, rigidity, and brittleness. An increase in the content of polylactide in mixtures leads to a decrease in the thermal stability of the samples and an increase in relative elongation. Polyhydroxybutyrate/ polylactide mixtures are recommended as packaging materials for food, agricultural, and pharmaceutical products.
鉴定了红球菌Au-1、假单胞菌PS-17、葡萄酒固氮菌N-15和聚羟基丁酸酯/聚乳酸酯混合物的聚羟基烷酸酯的热性能和物理力学性能。用聚乳酸改性聚羟基丁酸可以改善物理和机械特性,如耐热性、刚性和脆性。混合物中聚乳酸含量的增加导致样品的热稳定性降低和相对伸长率增加。聚羟基丁酸酯/聚乳酸混合物被推荐作为食品、农产品和医药产品的包装材料。
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引用次数: 0
Mechanical and thermal properties of cotton-bamboo fabric/glass fiber epoxy composites 棉竹纤维/玻璃纤维环氧树脂复合材料的力学性能和热性能
IF 1.6 4区 工程技术 Q4 POLYMER SCIENCE Pub Date : 2023-01-02 DOI: 10.14314/polimery.2022.11.4
Kailasam Chandrasekaran, Periyasamy Shanmugam, P. Senthilkumar
Five-layer epoxy composites consisting of two outer layers made of glass fiber and three inner layers of cotton-bamboo fabric were obtained by compression molding. The influence of glass fiber content (35, 40, 45 and 50 wt%) and the order of stacking laminate layers on the mechanical properties (tensile, flexural, compressive, impact strength), thermal properties (TGA) and structure (FTIR, SEM) of the composites was investigated. The best mechanical and thermal properties were obtained with the content of 45 wt% glass fiber.
采用模压成型的方法制备了由玻璃纤维外层和棉竹织物内层组成的五层环氧树脂复合材料。研究了玻璃纤维含量(35、40、45和50wt%)和叠层顺序对复合材料力学性能(拉伸、弯曲、压缩、冲击强度)、热性能(TGA)和结构(FTIR、SEM)的影响。当玻璃纤维含量为45wt%时,获得了最佳的力学性能和热性能。
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引用次数: 0
Hybrid polymer composites with enhanced energy absorption 增强能量吸收的杂化聚合物复合材料
IF 1.6 4区 工程技术 Q4 POLYMER SCIENCE Pub Date : 2022-12-27 DOI: 10.14314/polimery.2022.11.2
K. Czech, M. Oleksy, Rafał Oliwa, A. Domańska
This paper presents the influence of the type and structure of reinforcement, on the epoxy resin matrix polymer composites mechanical and ballistic properties. Aramid, basalt, glass fabrics and their hybrid systems were used as reinforcement. Impact strength according to Izod and "falling arrowhead", flexural strength and structure of the obtained composites were tested. The specific gravity was also determined. The aramid-glass hybrid composites showed high flexural strength (397 MPa) and Young's modulus (21 GPa). However, aramid-basalt composites had high impact strength (116 kJ/m2) and impact energy absorption (45 J).
本文研究了增强剂的种类和结构对环氧树脂基聚合物复合材料力学性能和弹道性能的影响。用芳纶、玄武岩、玻璃纤维及其混杂体系作为增强材料。对所得复合材料进行了冲击强度、“落箭头”强度、抗弯强度和结构测试。并测定了其比重。该复合材料具有较高的抗弯强度(397 MPa)和杨氏模量(21 GPa)。而芳纶-玄武岩复合材料具有较高的冲击强度(116 kJ/m2)和冲击吸能(45 J)。
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引用次数: 0
Vitamin E-loaded polymeric nanoparticles from biocompatible adipate-based copolymer obtained using the nanoprecipitation method 利用纳米沉淀法从生物相容性己二酸基共聚物中获得负载维生素e的聚合物纳米颗粒
IF 1.6 4区 工程技术 Q4 POLYMER SCIENCE Pub Date : 2022-11-30 DOI: 10.14314/polimery.2022.11.1
Martyna Sokołowska, Maja Marchwiana, M. El Fray
An enzymatic synthesis of new aliphatic biopolyesters - poly(butylene adipate)-co-(dilinol adipate) (PBA-DLA) with the use of monomers obtained from natural sources was carried out. Lipase B from the strain Candida antarctica (CALB) was used as a biocatalyst. The chemical structure of the PBA-DLA copolyester was confirmed by 1H NMR. In vitro biological studies did not show its cytotoxic effect on mouse fibroblast cells. PBA-DLA nanoparticles obtained in a single-stage nanoprecipitation process were used to encapsulate hydrophobic α-tocopherol (α-TP), the main component of vitamin E, obtaining an encapsulation efficiency of 48−74% (EE%) depending on the concentration of α-TP (2.5 ; 5; 10 mg/ml), which was confirmed by dynamic light scattering (DLS) analysis, ultraviolet spectroscopy (UV-VIS) and 1H NMR.
以天然来源的单体为原料,酶促合成了新型脂肪族生物聚酯——聚己二酸丁烯-邻己二醇(PBA-DLA)。利用南极念珠菌(CALB)脂肪酶B作为生物催化剂。PBA-DLA共聚酯的化学结构经1H NMR确证。体外生物学研究未发现其对小鼠成纤维细胞有细胞毒作用。采用单级纳米沉淀法获得的PBA-DLA纳米颗粒包封维生素E的主要成分疏水性α-生育酚(α-TP),包封效率为48−74% (EE%),不同浓度α-TP (2.5;5;10 mg/ml),通过动态光散射(DLS)分析、紫外光谱(UV-VIS)和1H NMR证实。
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引用次数: 1
Wpływ spieniania chemicznego na strukturę i wybrane właściwości PA6 wzmocnionego włóknem szklanym
IF 1.6 4区 工程技术 Q4 POLYMER SCIENCE Pub Date : 2022-11-17 DOI: 10.14314/polimery.2022.10.1
Zbadano wpływ procesu spieniania chemicznego na strukturę (SEM) oraz wybrane właściwościpoliamidu 6 wzmocnionego włóknem szklanym (30, 60 % mas.). Oznaczono gęstość, właściwościmechaniczne przy rozciąganiu i udarność Charpy’ego. Jako porofor stosowano Hydrocerol ITP 825w ilości 2% mas. Wielkość porów i stopień spieniania zależały od odległości od punku wtryskiwania.Najmniejszą wielkość porów (64 μm) stwierdzono w przypadku poliamidu zawierającego 60% mas.włókna szklanego.
研究了化学发泡工艺对玻璃纤维(30,60%质量)增强聚酰胺6的结构(SEM)和性能的影响。使用2%质量的Hydrocerol ITP 825w作为多孔载体。孔隙的大小和发泡程度取决于距注射点的距离。对于含有60%质量玻璃纤维的聚酰胺,发现最小孔径(64μm)。
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引用次数: 0
The influence of calcium carbonate and its modifications on the extrusion process and selected functional properties of polypropylene cast films 研究了碳酸钙及其改性剂对聚丙烯铸膜挤出工艺及功能性能的影响
IF 1.6 4区 工程技术 Q4 POLYMER SCIENCE Pub Date : 2022-11-17 DOI: 10.14314/polimery.2022.10.6
The purpose of the article was to determine the influence of calcium carbonate and its modification (with stearic acid) on selected properties of composite polypropylene films and their processing. Polypropylene composites containing, respectively, 5, 10, 20 and 30 wt% filler, were made in twin-screw extrusion process with cold granulation. Films, on the other hand, were produced in single-screw extrusion process (an extruder with a screw with diameter d = 20 mm and ratio l/d = 24) using a flat head (so-called cast films) and a chill roll type cooling and pull-back device. The pull-back rotational speed was selected so as to obtain films of a thickness of approx. 120 µm, irrespectively of the composite being processed. The assessment of the effect of the addition of applied fillers on the magnitude of the melt volume-flow rate (MVR) of polypropylene and the processing characteristic of extrusion process was made (the flow resistance and the variations in volumetric flow rate were determined). It was demonstrated how variations in the processability of polymeric material determined the correction of extrusion process setup parameters (pull-back system speed). The processability of composite films under extensional flow conditions was also determined by evaluating the extensional viscosity (ηE) of the composites. The strength values of composite films were determined under static tension conditions and in puncture tests. The effect of the content and modification of CaCO3 on the film haze and gloss was also assessed. The investigation carried out has demonstrated a direct effect of the addition of calcium carbonate and its modification on the processability and selected functional properties of composite films. The study has also proved that stearic acid is an effective modifier of processing properties, not only in shear flow conditions, but also under extensional flow conditions – smaller ηE values are exhibited by films containing modified calcium carbonate.
本文的目的是确定碳酸钙及其改性(硬脂酸)对复合聚丙烯薄膜的选定性能及其加工的影响。采用双螺杆冷造粒挤压法制备了填充量分别为5%、10%、20%和30%的聚丙烯复合材料。另一方面,薄膜是在单螺杆挤压过程中生产的(螺杆直径d = 20 mm,比l/d = 24的挤出机),使用平头(所谓的铸膜)和冷辊式冷却和回拉装置。选择回拉转速,得到的薄膜厚度约为。120µm,与所加工的复合材料无关。评价了外加填料的加入对聚丙烯熔体体积流率(MVR)的大小和挤出工艺特性的影响(确定了流动阻力和体积流率的变化)。演示了聚合物材料可加工性的变化如何决定挤出工艺设置参数的修正(回拉系统速度)。通过评价复合材料的拉伸粘度ηE,确定了复合材料薄膜在拉伸流动条件下的可加工性。在静态拉伸条件下和穿刺试验中测定了复合膜的强度值。评价了CaCO3的含量和改性对膜雾度和光泽度的影响。研究表明,碳酸钙的加入及其改性对复合薄膜的加工性能和选定的功能性能有直接影响。研究还证明,硬脂酸是一种有效的工艺性能调节剂,不仅在剪切流动条件下,而且在拉伸流动条件下,含有改性碳酸钙的薄膜的ηE值都较小。
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引用次数: 0
Influence of various forms of cellulose on the mechanical properties of polymer composites modified in a constant magnetic field 恒磁场下不同形式纤维素对改性高分子复合材料力学性能的影响
IF 1.6 4区 工程技术 Q4 POLYMER SCIENCE Pub Date : 2022-11-16 DOI: 10.14314/polimery.2022.10.4
E. Miękoś, M. Zieliński, D. Sroczyński, A. Fenyk
The paper presents the study of polymer composites on epoxy resin matrix, polymerized in the environment of a constant magnetic field. The composites contained admixtures of various forms of cellulose – microcrystalline cellulose and cellulose from waste hemp straw fibers – in an amount ranging from 10 to 30 wt%. Changes in the mechanical properties due to the effect of a constant magnetic field with a magnetic induction value of B = 0.5 T. The composites additionally contained magnetic particles in the form of carbonyl iron, in the amount of 10 wt%.
本文研究了在恒定磁场环境下聚合的环氧树脂基聚合物复合材料。该复合材料含有各种形式的纤维素的混合物——微晶纤维素和废弃大麻秸秆纤维中的纤维素——含量从10%到30%不等。由于磁感应值为B=0.5T的恒定磁场的影响而导致的机械性能的变化。复合材料还含有含量为10wt%的羰基铁形式的磁性颗粒。
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引用次数: 0
Environmentally hazard and toxic exoskeletons of marine crustaceans wastes in synthesizing N-deacetylated chitin 海洋甲壳类废弃物外骨骼合成n -去乙酰化几丁质的环境危害和毒性
IF 1.6 4区 工程技术 Q4 POLYMER SCIENCE Pub Date : 2022-11-16 DOI: 10.14314/polimery.2022.10.5
Rasha E El-Mekawy
High molecular weight chitosan was synthesized from shrimp shells. Chemical structure of chitosan was confirmed using FT-IR, XRD, TGA, and SEM analyses. Physicochemical properties of chitosan such as molecular weight (800 000 g/mol), deacetylation degree (80%), ash content (1%) indicating effectiveness of demineralization step in removing minerals, water binding capacity (4220%), and fat binding capacity (537%), were determined. FT-IR spectra exhibited characteristic joint band at 3365 cm-1 due to –OH and –NH2 regarding to the conversion of chitin acetyl group to NH2 of chitosan.
以虾壳为原料合成了高分子量壳聚糖。通过红外光谱、X射线衍射、热重分析和扫描电镜分析,确定了壳聚糖的化学结构。测定了壳聚糖的物理化学性质,如分子量(80万g/mol)、脱乙酰度(80%)、灰分(1%),表明脱矿步骤对矿物的去除效果、水结合能力(4220%)和脂肪结合能力(537%)。由于壳聚糖乙酰基转化为NH2的–OH和–NH2,FT-IR光谱在3365 cm-1处显示出特征性的结合带。
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引用次数: 0
Homo- and copolymerization of 2-benzothiazoylacrylamide with α-methyl styrene and methyl acrylate: synthesis, characterization and reactivity 2-苯并噻唑基丙烯酰胺与α-甲基苯乙烯和丙烯酸甲酯的共聚:合成、表征和反应性
IF 1.6 4区 工程技术 Q4 POLYMER SCIENCE Pub Date : 2022-11-04 DOI: 10.14314/polimery.2022.10.3
A. Al-Mokaram, Ameen Hadi Mohammed, Hiba A. Ghani
2-benzothiazolyl acrylamide (BTA) monomer was synthesized by reacting of 2-aminobenzothiazole with acryloyl chloride. Homo- and copolymerization of this monomer with α-methylstyrene (MSt) and methyl acrylate (MA) was carried out in dimethylsulfoxide (DMSO) solution. The prepared homo-and copolymers were characterized by Fourier Transform Infrared (FTIR) and their thermal stability was studied by thermogravimetric analysis (TGA). The composition of copolymers and the reactivity coefficients (r1, r2) were determined on the basis of sulfur analysis using linearization methods proposed by Fineman-Ross and Kelen-Tudos and the Mayo-Lewis intersection method. The derived (r1, r2) for BTA-co-MSt and BTA-co-MA are: (0.197, 0.230) and (0.294, 4.314), respectively. The microstructure of the copolymers and the distribution of the monomer sequences in the copolymers were calculated statistically, the results obtained are consistent with the values (r1, r2). BTA with MSt form alternative copolymer whilst BTA-co-MA tends to be block with MA.
以2-氨基苯并噻唑与丙烯酰氯反应合成了2-苯并噻唑丙烯酰胺(BTA)单体。在二甲基亚砜(DMSO)溶液中,该单体与α-甲基苯乙烯(MSt)和丙烯酸甲酯(MA)进行了均聚和共聚。用傅立叶变换红外光谱(FTIR)对制备的均聚物和共聚物进行了表征,并用热重分析(TGA)研究了它们的热稳定性。共聚物的组成和反应系数(r1,r2)是在硫分析的基础上使用Fineman-Ross和Kelen-Tudos提出的线性化方法和Mayo-Lewis交叉法确定的。BTA-co-MSt和BTA-co-MA的推导值(r1,r2)分别为:(0.197,0.230)和(0.294,4.314)。对共聚物的微观结构和单体序列在共聚物中的分布进行了统计计算,得到的结果与值(r1,r2)一致。BTA与MSt形成替代共聚物,而BTA-co-MA倾向于与MA嵌段。
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引用次数: 0
Gamma-induced grafting of rice straw cellulose with polyvinylpyrrolidone γ诱导聚乙烯吡咯烷酮接枝稻草纤维素
IF 1.6 4区 工程技术 Q4 POLYMER SCIENCE Pub Date : 2022-10-26 DOI: 10.14314/polimery.2022.9.6
M. Suhartini, Zetryana Puteri Tachrim, Niken Hayudanti Anggarini, R. Rahmawati, Amanda Prasetyani, June Melawati, D. Deswita, B. Sugeng
Cellulose obtained from rice straw was grafted with polyvinylpyrrolidone (Cell-g-PVP). The process was induced by simultaneous gamma iradiation (Co-60). The presence of the grafted PVP chains was confirmed by FT-IR, XRD and EDS methods. The influence of the iradiation dose (20 and 30 kGy) on the reaction efficiency and thermal stability of Cell-g-PVP was investigated. The grafting yield at the dose of 30 kGy was about 56%. The higher dose of radiation resulted in better thermal stability. The AAS results showed that Ni(II), Cu(II), and Cr(II) ions can be adsorbed by Cell-g-PVP. The order of ion metals adsorption capacity of Cell-g-PVP was Cu(II) > Ni(II) > Cr(II). The adsorption isotherm of Cu(II) metal ion using the Cell-g-PVP followed the Langmuir adsorption isotherm whereas the chemical adsorption and the adsorption energy were constant on all sides of the copolymer.
以稻草为原料,用聚乙烯吡咯烷酮(Cell-g-PVP)接枝纤维素。该过程是由同时γ射线辐照(Co-60)诱导的。通过FT-IR、XRD和EDS等方法证实了接枝PVP链的存在。研究了辐照剂量(20和30kGy)对Cell-g-PVP反应效率和热稳定性的影响。30kGy剂量的接枝率约为56%。辐射剂量越高,热稳定性越好。原子吸收光谱结果表明,Cell-g-PVP可以吸附Ni(II)、Cu(II)和Cr(II)离子。Cell-g-PVP对离子金属的吸附能力依次为Cu(II)>Ni(II)>Cr(II)。使用Cell-g-PVP对Cu(II)金属离子的吸附等温线遵循Langmuir吸附等温线,而化学吸附和吸附能在共聚物的所有侧面上都是恒定的。
{"title":"Gamma-induced grafting of rice straw cellulose with polyvinylpyrrolidone","authors":"M. Suhartini, Zetryana Puteri Tachrim, Niken Hayudanti Anggarini, R. Rahmawati, Amanda Prasetyani, June Melawati, D. Deswita, B. Sugeng","doi":"10.14314/polimery.2022.9.6","DOIUrl":"https://doi.org/10.14314/polimery.2022.9.6","url":null,"abstract":"Cellulose obtained from rice straw was grafted with polyvinylpyrrolidone (Cell-g-PVP). The process was induced by simultaneous gamma iradiation (Co-60). The presence of the grafted PVP chains was confirmed by FT-IR, XRD and EDS methods. The influence of the iradiation dose (20 and 30 kGy) on the reaction efficiency and thermal stability of Cell-g-PVP was investigated. The grafting yield at the dose of 30 kGy was about 56%. The higher dose of radiation resulted in better thermal stability. The AAS results showed that Ni(II), Cu(II), and Cr(II) ions can be adsorbed by Cell-g-PVP. The order of ion metals adsorption capacity of Cell-g-PVP was Cu(II) > Ni(II) > Cr(II). The adsorption isotherm of Cu(II) metal ion using the Cell-g-PVP followed the Langmuir adsorption isotherm whereas the chemical adsorption and the adsorption energy were constant on all sides of the copolymer.","PeriodicalId":20319,"journal":{"name":"Polimery","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47515505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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