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Reactive compatibilization of biodegradable PLA/TPU blends via hybrid nanoparticle
Progress in Rubber, Plastics and Recycling Technology ( IF 2.6 ) Pub Date : 2021-05-31 , DOI: 10.1177/14777606211019423
Nilay Tuccar Kilic 1 , Buse Nur Can 1 , Mehmet Kodal 1, 2 , Güralp Özkoç 1, 2, 3
Affiliation  

In this study, the compatibilization effects of triglycidylisobutyl polyhedral oligomeric silsesquioxane (TEpPOSS) on biodegradable poly(lactic acid) (PLA)/thermoplastic polyurethane (TPU) blends were investigated. All blends were prepared via melt blending and PLA/TPU (80/20, 70/30, 50/50 wt%) ratio was selected as the experimental parameter. In order to predict the selective localization of TEpPOSS thermodynamically, wetting coefficient were determined by means of surface energy measurements. Morphological analyses were carried out by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Moreover, rheological, mechanical, thermomechanical and thermal properties of the blends were performed via rheometer, universal tensile tester, dynamic mechanic analyses and differential scanning calorimeter (DSC), respectively. Morphological test results revealed that TEpPOSSs were mostly located at the interfaces of the PLA and TPU phases. According to the rheological studies, the interfacial interactions between PLA and TPU were improved with the addition of TEpPOSS, which resulted from the potential reactions between epoxy-carboxylic acid and/or epoxy-hydroxyl functional groups. The addition of TEpPOSS enhanced the mechanical properties of PLA/TPU blends. DSC test results revealed a decrease in the glass transition temperatures of PLA in the presence of TEpPOSS, which was an another indication of improved compatibility between PLA and TPU.



中文翻译:

可生物降解的 PLA/TPU 混合物通过混合纳米颗粒的反应增容

在这项研究中,研究了三缩水甘油异丁基多面体低聚倍半硅氧烷 (TEpPOSS) 对可生物降解的聚乳酸 (PLA)/热塑性聚氨酯 (TPU) 共混物的增容作用。所有共混物均通过熔融共混制备,并选择 PLA/TPU(80/20、70/30、50/50 wt%)比例作为实验参数。为了从热力学上预测 TEpPOSS 的选择性定位,润湿系数通过表面能测量来确定。通过扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 进行形态学分析。此外,共混物的流变、机械、热机械和热性能分别通过流变仪、万能拉伸试验机、动态力学分析和差示扫描量热仪 (DSC) 进行测定。形态学测试结果表明,TEpPOSSs 主要位于 PLA 和 TPU 相的界面处。根据流变学研究,加入 TEpPOSS 改善了 PLA 和 TPU 之间的界面相互作用,这是由于环氧-羧酸和/或环氧-羟基官能团之间的潜在反应。TEpPOSS 的添加增强了 PLA/TPU 共混物的机械性能。DSC 测试结果显示,在 TEpPOSS 存在下 PLA 的玻璃化转变温度降低,这是 PLA 和 TPU 之间兼容性提高的另一个迹象。通过添加 TEpPOSS,PLA 和 TPU 之间的界面相互作用得到改善,这是由于环氧-羧酸和/或环氧-羟基官能团之间的潜在反应。TEpPOSS 的添加增强了 PLA/TPU 共混物的机械性能。DSC 测试结果显示,在 TEpPOSS 存在下 PLA 的玻璃化转变温度降低,这是 PLA 和 TPU 之间兼容性提高的另一个迹象。通过添加 TEpPOSS,PLA 和 TPU 之间的界面相互作用得到改善,这是由于环氧-羧酸和/或环氧-羟基官能团之间的潜在反应。TEpPOSS 的添加增强了 PLA/TPU 共混物的机械性能。DSC 测试结果显示,在 TEpPOSS 存在下 PLA 的玻璃化转变温度降低,这是 PLA 和 TPU 之间兼容性提高的另一个迹象。

更新日期:2021-05-31
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