Fiber electrospun mats created using cylindrical collectors have been extensively studied as effective membranes for water treatment. However, the relationships between the properties of electrospun mats and the characteristics and performance of membranes are not well‐established. This research examined two samples with average fiber diameters of 1.8 ± 0.49 μm and 0.47 ± 0.26 μm, which were evaluated as supporting substrates for the separation of MgSO4 ions. The variation in fiber diameter resulted from consistent conditions of voltage, distance, and collector rotation speed, while the injection rates were different, set at 2 mL/h and 0.8 mL/h, respectively. The resulting thin‐film composite (TFC) membrane consists of three layers: the first layer is a mesh polyester that underlies a middle hydrophobic electrospun support layer made from a 20 wt.% polysulfone solution. The third layer is a polyamide layer created through interfacial polymerization, involving a reaction between piperazine (PIP) monomers at a concentration of 2% by weight and trimesoyl chloride (TMC) monomers at a concentration of 0.2% by weight. Due to its hydrophobic nature, PSU repels water monomers from its surface during polymerization. Consequently, surface modification using plasma treatment alters the surface characteristics from hydrophobic to hydrophilic, resulting in the formation of a superior polyamide layer. The results indicate that membranes with larger fiber diameters exhibit a rougher texture. Additionally, the increased void space between the fibers in these membranes leads to an increase in pure water flux that is 92% higher compared to membrane samples with smaller fiber diameters; this higher flux is due to larger pore size. Furthermore, membranes with smaller fiber diameters possess a finer pore structure, resulting in a polyamide layer with fewer defects than membranes with larger fibers. This improved structure achieved a separation efficiency of 68% ± 1.02% for MgSO4, while the membrane with an average fiber diameter of 1.80 ± 0.49 μm demonstrated a separation rate of 20% ± 2.26%. These findings provide a step forward in the development of a theoretical framework for engineering TFC membranes with electrospun mats as supports.
{"title":"Insight Into the Role of Fiber Diameter on Electrospun Polysulfone Mats","authors":"Zahra Khezri, Sedigheh Pirsalami, Sina Avaji, Seyed Hamed Mousavi, Masoud Riazi","doi":"10.1002/pol.20240343","DOIUrl":"https://doi.org/10.1002/pol.20240343","url":null,"abstract":"Fiber electrospun mats created using cylindrical collectors have been extensively studied as effective membranes for water treatment. However, the relationships between the properties of electrospun mats and the characteristics and performance of membranes are not well‐established. This research examined two samples with average fiber diameters of 1.8 ± 0.49 μm and 0.47 ± 0.26 μm, which were evaluated as supporting substrates for the separation of MgSO<jats:sub>4</jats:sub> ions. The variation in fiber diameter resulted from consistent conditions of voltage, distance, and collector rotation speed, while the injection rates were different, set at 2 mL/h and 0.8 mL/h, respectively. The resulting thin‐film composite (TFC) membrane consists of three layers: the first layer is a mesh polyester that underlies a middle hydrophobic electrospun support layer made from a 20 wt.% polysulfone solution. The third layer is a polyamide layer created through interfacial polymerization, involving a reaction between piperazine (PIP) monomers at a concentration of 2% by weight and trimesoyl chloride (TMC) monomers at a concentration of 0.2% by weight. Due to its hydrophobic nature, PSU repels water monomers from its surface during polymerization. Consequently, surface modification using plasma treatment alters the surface characteristics from hydrophobic to hydrophilic, resulting in the formation of a superior polyamide layer. The results indicate that membranes with larger fiber diameters exhibit a rougher texture. Additionally, the increased void space between the fibers in these membranes leads to an increase in pure water flux that is 92% higher compared to membrane samples with smaller fiber diameters; this higher flux is due to larger pore size. Furthermore, membranes with smaller fiber diameters possess a finer pore structure, resulting in a polyamide layer with fewer defects than membranes with larger fibers. This improved structure achieved a separation efficiency of 68% ± 1.02% for MgSO<jats:sub>4</jats:sub>, while the membrane with an average fiber diameter of 1.80 ± 0.49 μm demonstrated a separation rate of 20% ± 2.26%. These findings provide a step forward in the development of a theoretical framework for engineering TFC membranes with electrospun mats as supports.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"1 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Li Zhao, Shulai Lu, Ming Chen, Yuchao Wang, Shicheng Zhao
The stability of agglomerating agent is an important parameter to evaluate its value, which is of great significance for its subsequent transportation, storage, and practical application. In this study, a highly stable agglomerating agent synergistically stabilized by sodium dodecyl sulfate (SDS) and SiO2 was synthesized. The stabilization mechanism of the agglomerating agent and its agglomeration effect on polybutadiene latex (PBL) were studied. First, the mean particle size, particle size distribution, interfacial tension, and viscosity of the agglomerating agent emulsion stabilized by SDS/SiO2 has been investigated and compared with those of conventional emulsion stabilized by SDS. The results show that when the SDS concentration is lower than 0.125%, the presence of SiO2 can significantly increase the anticoagulation ability of agglomerating agent particles in the polymerization process. Furthermore, noting that agglomerating agent emulsions stabilized by SDS/SiO2 exhibited high stability even pH, centrifugation, storage, and temperatures changed in wide range. In addition, the stability of the agglomerating agents synergistically stabilized by surfactants and SiO2 nanoparticles is better than using them alone. Then, the stability mechanism of SiO2 in the agglomerating agent was investigated. The results revealed that the SiO2 particles are tightly adsorbed on the surface of the agglomerating agent particles through hydrogen bonding and play a physical isolation role. Finally, the 100 nm PBL was enlarged to 469 nm by a synthetic agglomerating agent. Surprisingly, the SiO2 particles show excellent physical isolation role, not only in agglomerating agent but also in agglomerated PBL. Our findings provide novel insights into the synthesis of highly stable agglomerating agent and improve the practical application significance of subsequent PBL agglomerations and ABS properties.
{"title":"Agglomerating Agent Emulsions Synergistically Stabilized by Surfactants and SiO2 Nanoparticles: Stability, Mechanism, and Applications for PBL Agglomeration","authors":"Li Zhao, Shulai Lu, Ming Chen, Yuchao Wang, Shicheng Zhao","doi":"10.1002/pol.20240555","DOIUrl":"https://doi.org/10.1002/pol.20240555","url":null,"abstract":"The stability of agglomerating agent is an important parameter to evaluate its value, which is of great significance for its subsequent transportation, storage, and practical application. In this study, a highly stable agglomerating agent synergistically stabilized by sodium dodecyl sulfate (SDS) and SiO<jats:sub>2</jats:sub> was synthesized. The stabilization mechanism of the agglomerating agent and its agglomeration effect on polybutadiene latex (PBL) were studied. First, the mean particle size, particle size distribution, interfacial tension, and viscosity of the agglomerating agent emulsion stabilized by SDS/SiO<jats:sub>2</jats:sub> has been investigated and compared with those of conventional emulsion stabilized by SDS. The results show that when the SDS concentration is lower than 0.125%, the presence of SiO<jats:sub>2</jats:sub> can significantly increase the anticoagulation ability of agglomerating agent particles in the polymerization process. Furthermore, noting that agglomerating agent emulsions stabilized by SDS/SiO<jats:sub>2</jats:sub> exhibited high stability even pH, centrifugation, storage, and temperatures changed in wide range. In addition, the stability of the agglomerating agents synergistically stabilized by surfactants and SiO<jats:sub>2</jats:sub> nanoparticles is better than using them alone. Then, the stability mechanism of SiO<jats:sub>2</jats:sub> in the agglomerating agent was investigated. The results revealed that the SiO<jats:sub>2</jats:sub> particles are tightly adsorbed on the surface of the agglomerating agent particles through hydrogen bonding and play a physical isolation role. Finally, the 100 nm PBL was enlarged to 469 nm by a synthetic agglomerating agent. Surprisingly, the SiO<jats:sub>2</jats:sub> particles show excellent physical isolation role, not only in agglomerating agent but also in agglomerated PBL. Our findings provide novel insights into the synthesis of highly stable agglomerating agent and improve the practical application significance of subsequent PBL agglomerations and ABS properties.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"47 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"100th Anniversary Celebration of Sun Yat-sen University (SYSU): Polymer Research in SYSU","authors":"Yi Shi, Jun Fu, Yongming Chen","doi":"10.1002/pol.20240882","DOIUrl":"https://doi.org/10.1002/pol.20240882","url":null,"abstract":"","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 21","pages":"4807-4808"},"PeriodicalIF":3.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The cover image is based on the Article Influence of structural variations in polysarcosine functionalized lipids on lipid nanoparticle-mediated mRNA delivery by Runcheng Tan et al., https://doi.org/10.1002/pol.20240154
{"title":"Cover Image, Volume 62, Issue 21","authors":"Runcheng Tan, Guangqi Huang, Cong Wei, Zepeng He, Tianyu Zhao, Yi Shi, Zhijia Liu, Yongming Chen","doi":"10.1002/pola.31366","DOIUrl":"https://doi.org/10.1002/pola.31366","url":null,"abstract":"<p>The cover image is based on the Article <i>Influence of structural variations in polysarcosine functionalized lipids on lipid nanoparticle-mediated mRNA delivery</i> by Runcheng Tan et al., https://doi.org/10.1002/pol.20240154\u0000 \u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 21","pages":"i"},"PeriodicalIF":3.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/pola.31366","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The cover image is based on the Article Bio-composite using polyhydroxyalkanoates and sustainable nanofillers derived from cellulose nanofibers and its application for an environmentally friendly packaging material by Jaemin Jo and Bonwook Koo, https://doi.org/10.1002/pol.20240419.
封面图片根据 Jaemin Jo 和 Bonwook Koo 的文章 "使用聚羟基烷酸酯和可持续纳米填料的生物复合材料（源自纤维素纳米纤维）及其在环保包装材料中的应用 "绘制，https://doi.org/10.1002/pol.20240419。
{"title":"Inside Cover","authors":"","doi":"10.1002/pola.31338","DOIUrl":"https://doi.org/10.1002/pola.31338","url":null,"abstract":"<p>The cover image is based on the Article <i>Bio-composite using polyhydroxyalkanoates and sustainable nanofillers derived from cellulose nanofibers and its application for an environmentally friendly packaging material</i> by Jaemin Jo and Bonwook Koo, https://doi.org/10.1002/pol.20240419.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 20","pages":"ii"},"PeriodicalIF":3.9,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/pola.31338","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The cover image is based on the Article Optically transparent and refractive thiol-ene polymers containing cyclotriphosphazenes by Jeong-Un Jin and Miyeon Lee et al., https://doi.org/10.1002/pol.20240386.
封面图片来源于 Jeong-Un Jin 和 Miyeon Lee 等人撰写的文章《含环三磷嗪的光学透明和折射性硫醇烯聚合物》，https://doi.org/10.1002/pol.20240386。
{"title":"Cover Image, Volume 62, Issue 19","authors":"Jeong-Un Jin, Miyeon Lee, Nam-Ho You","doi":"10.1002/pola.31331","DOIUrl":"https://doi.org/10.1002/pola.31331","url":null,"abstract":"<p>The cover image is based on the Article <i>Optically transparent and refractive thiol-ene polymers containing cyclotriphosphazenes</i> by Jeong-Un Jin and Miyeon Lee et al., https://doi.org/10.1002/pol.20240386.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"62 19","pages":"i"},"PeriodicalIF":3.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/pola.31331","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142404280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The self-healing epoxy based on microencapsulated epoxy-amine chemistry is a system with great potential for practical applications. Herein, microcapsules respectively containing epoxy and polyetheramine were fabricated using a microencapsulation technique via integrating electrospraying and interfacial polymerization (ES-IP) and self-healing epoxy based on the dual microcapsules were systematically investigated regarding the microcapsule dispersion, healing performance, failure mode, and mechanical properties. Microcapsules with different sizes were conveniently prepared by adjusting the injection rate. The microcapsules, regardless of the size, can be well dispersed in the epoxy matrix. The effects of the microcapsule size and concentration on the healing performance were studied. While full healing can be obtained for microcapsule >100 μm, high healing efficiency of about 90% and 70% can be achieved for microcapsules in 50 ~ 100 μm and ~ 50 μm, respectively. The healing performance decreases with the decreased microcapsule concentration. However, healing efficiency >70% can still be obtained when 5.0 wt% microcapsule of 50 ~ 100 μm were adopted. Mixed failure modes including adhesive failure, cohesive failure, and matrix failure, were observed, due to the good performance of the selected healant system. While the incorporated microcapsules, especially the small ones, evidently toughens the matrix, they deteriorate the tensile properties of the formulated self-healing material.
{"title":"High-performance self-healing epoxy by microencapsulated epoxy-amine chemistry II: Performance of the system","authors":"Mengzhang Zhu, Kaibin Xiao, He Zhang","doi":"10.1002/pol.20240587","DOIUrl":"https://doi.org/10.1002/pol.20240587","url":null,"abstract":"The self-healing epoxy based on microencapsulated epoxy-amine chemistry is a system with great potential for practical applications. Herein, microcapsules respectively containing epoxy and polyetheramine were fabricated using a microencapsulation technique via integrating electrospraying and interfacial polymerization (ES-IP) and self-healing epoxy based on the dual microcapsules were systematically investigated regarding the microcapsule dispersion, healing performance, failure mode, and mechanical properties. Microcapsules with different sizes were conveniently prepared by adjusting the injection rate. The microcapsules, regardless of the size, can be well dispersed in the epoxy matrix. The effects of the microcapsule size and concentration on the healing performance were studied. While full healing can be obtained for microcapsule >100 μm, high healing efficiency of about 90% and 70% can be achieved for microcapsules in 50 ~ 100 μm and ~ 50 μm, respectively. The healing performance decreases with the decreased microcapsule concentration. However, healing efficiency >70% can still be obtained when 5.0 wt% microcapsule of 50 ~ 100 μm were adopted. Mixed failure modes including adhesive failure, cohesive failure, and matrix failure, were observed, due to the good performance of the selected healant system. While the incorporated microcapsules, especially the small ones, evidently toughens the matrix, they deteriorate the tensile properties of the formulated self-healing material.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"10 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, a series of (A3 + B3)-type fluorinated hyperbranched poly(amide-imides) were successfully synthesized with carbazole and fluorene units as end-capping moieties. All synthesized end-capping hyperbranched PAIs showed over 70% branching as determined by 1H NMR, demonstrating good solubility and thermal stability (Tgs: 242–263°C, T10%: 576–629°C). The HOMO and LUMO energy levels of hyperbranched PAI films were measured at 4.65–4.73 and 1.51–1.66 eV, respectively, suggesting favorable reoxidation and reduction characteristics. PAI-2 demonstrates a 46.6% transmittance variation (∆T, 418 nm), along with a coloring/bleaching process time of 2.3 s/1.6 s, a coloring efficiency (CE) of 310 cm2/C, and exceptional redox stability over 100 cycles. Furthermore, the synthesized PAIs containing electron-withdrawing groups exhibited a high iodine adsorption capacity as determined by iodine adsorption tests (PAI-1: 534 mg/g, PAI-2: 579 mg/g, PAI-3: 490 mg/g).
本研究成功合成了一系列以咔唑和芴为端封端的 (A3 + B3) 型含氟超支化聚（酰胺-酰亚胺）。经 1H NMR 测定，所有合成的末端封端的超支化 PAIs 的支化率均超过 70%，具有良好的溶解性和热稳定性（Tgs：242-263°C，T10%：576-629°C）。超支化 PAI 薄膜的 HOMO 和 LUMO 能级分别为 4.65-4.73 和 1.51-1.66 eV，表明其具有良好的氧化还原特性。PAI-2 的透射率变化率为 46.6%（ΔT，418 纳米），着色/漂白过程时间为 2.3 秒/1.6 秒，着色效率（CE）为 310 cm2/C，并且在 100 次循环中具有优异的氧化还原稳定性。此外，根据碘吸附测试（PAI-1：534 毫克/克；PAI-2：579 毫克/克；PAI-3：490 毫克/克），合成的含有电子抽离基团的 PAIs 具有很高的碘吸附能力。
{"title":"Preparation of novel fluorinated highly branched (A3 + B3)-type hyperbranched poly(amide-imides) for electrochromism and iodine adsorption","authors":"Wen Yang, ZeBang Sun, XiaoSa Zhang, XiaoYu Zhu, Jian Luan, ZhengKai Li, WenZe Li, Yu Liu","doi":"10.1002/pol.20240477","DOIUrl":"https://doi.org/10.1002/pol.20240477","url":null,"abstract":"In this study, a series of (A<sub>3</sub> + B<sub>3</sub>)-type fluorinated hyperbranched poly(amide-imides) were successfully synthesized with carbazole and fluorene units as end-capping moieties. All synthesized end-capping hyperbranched PAIs showed over 70% branching as determined by <sup>1</sup>H NMR, demonstrating good solubility and thermal stability (<i>T</i><sub>g</sub><i>s</i>: 242–263°C, <i>T</i><sub>10%</sub>: 576–629°C). The HOMO and LUMO energy levels of hyperbranched PAI films were measured at 4.65–4.73 and 1.51–1.66 eV, respectively, suggesting favorable reoxidation and reduction characteristics. PAI-2 demonstrates a 46.6% transmittance variation (<i>∆T</i>, 418 nm), along with a coloring/bleaching process time of 2.3 s/1.6 s, a coloring efficiency (CE) of 310 cm<sup>2</sup>/C, and exceptional redox stability over 100 cycles. Furthermore, the synthesized PAIs containing electron-withdrawing groups exhibited a high iodine adsorption capacity as determined by iodine adsorption tests (PAI-1: 534 mg/g, PAI-2: 579 mg/g, PAI-3: 490 mg/g).","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"118 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hydroxy-terminated polyether (HTPE) binders are attractive in the weapons materials and equipment industry for their insensitive properties and flexibility. We propose an interpretable machine learning-assisted modeling strategy to predict the mechanical properties of HTPE binders for the first time using machine learning methods. In this strategy, the effects of formulation composition, multiscale characterization, preparation conditions, and mechanical experimental conditions are evaluated on the mechanical properties of HTPE binders. As part of the study, three different techniques were used to predict material properties: bag-based methods (Extra Random Tree, Random Forest), boosting-based methods (XGBoost, CatBoost, and Gradient Boosted Regression), and Artificial Neural Networks (MLPs), all of which were highly accurate in predicting material properties. Based on this, SHAP analysis is used to explain how these influencing factors influence the material properties. An efficient method for examining HTPE binders formulations is provided by this strategy.
{"title":"Interpretable machine learning-assisted strategy for predicting the mechanical properties of hydroxyl-terminated polyether binders","authors":"Ruohan Han, Xiaolong Fu, Hongwei Guo","doi":"10.1002/pol.20240522","DOIUrl":"https://doi.org/10.1002/pol.20240522","url":null,"abstract":"Hydroxy-terminated polyether (HTPE) binders are attractive in the weapons materials and equipment industry for their insensitive properties and flexibility. We propose an interpretable machine learning-assisted modeling strategy to predict the mechanical properties of HTPE binders for the first time using machine learning methods. In this strategy, the effects of formulation composition, multiscale characterization, preparation conditions, and mechanical experimental conditions are evaluated on the mechanical properties of HTPE binders. As part of the study, three different techniques were used to predict material properties: bag-based methods (Extra Random Tree, Random Forest), boosting-based methods (XGBoost, CatBoost, and Gradient Boosted Regression), and Artificial Neural Networks (MLPs), all of which were highly accurate in predicting material properties. Based on this, SHAP analysis is used to explain how these influencing factors influence the material properties. An efficient method for examining HTPE binders formulations is provided by this strategy.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"18 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The adopted healant has a significant impact on the final healing performance of self-healing materials. Herein, the healant system, bisphenol-F diglycidyl ether (BFDGE) and polytheramine JEFFAMINE T403, which possesses the capability of fully healing at room temperature (RT) for epoxy, was investigated in depth. The healing potential of this healant system and its healing benchmark after microencapsulation were systematically studied using a manual injecting method. It shows that the maximum and benchmark healing efficiencies respectively reach about 210% and 170% at RT for 48 h. The robustness of the cured healant was checked by studying the mechanical properties of BFDGE/T403. It verified that the tensile properties of the healant are stable after RT curing for 48 h. The curing degree of the healant was further characterized using differential scanning calorimetry by measuring the residual exotherm. It reaches 90% when the maximum healing performance is achieved and stabilizes at 95% thereafter. The results from the manually healing test, the tensile test, and the DSC test, are consistent with each other, which validate the robustness of BFDGE/T403 as healant for self-healing epoxies.
{"title":"High-performance self-healing epoxy by microencapsulated epoxy-amine chemistry I: Properties of the adopted healant system","authors":"Mengzhang Zhu, Kaibin Xiao, He Zhang","doi":"10.1002/pol.20240588","DOIUrl":"https://doi.org/10.1002/pol.20240588","url":null,"abstract":"The adopted healant has a significant impact on the final healing performance of self-healing materials. Herein, the healant system, bisphenol-F diglycidyl ether (BFDGE) and polytheramine JEFFAMINE T403, which possesses the capability of fully healing at room temperature (RT) for epoxy, was investigated in depth. The healing potential of this healant system and its healing benchmark after microencapsulation were systematically studied using a manual injecting method. It shows that the maximum and benchmark healing efficiencies respectively reach about 210% and 170% at RT for 48 h. The robustness of the cured healant was checked by studying the mechanical properties of BFDGE/T403. It verified that the tensile properties of the healant are stable after RT curing for 48 h. The curing degree of the healant was further characterized using differential scanning calorimetry by measuring the residual exotherm. It reaches 90% when the maximum healing performance is achieved and stabilizes at 95% thereafter. The results from the manually healing test, the tensile test, and the DSC test, are consistent with each other, which validate the robustness of BFDGE/T403 as healant for self-healing epoxies.","PeriodicalId":16888,"journal":{"name":"Journal of Polymer Science","volume":"15 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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