The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
Carbohydr Polym. 2021 Feb 15;254:117321. doi: 10.1016/j.carbpol.2020.117321. Epub 2020 Oct 31.
A novel core-shell starch-based nanoparticles (CSS NPs) with a "hard" starch core and a "soft" poly (methyl acrylate) (PMA) shell was prepared and incorporated into a PPC/PLA blend. The excellent compatibilization of CSS NPs was revealed by atomic force microscope (AFM), differential scanning calorimetry (DSC) and rheological test. More importantly, due to the excellent compatibilization the resulted PPC/PLA/CSS blend exhibited a strikingly improved mechanical and thermal properties. Compared to PPC/PLA (60/40), the elongation at break of PPC/PLA/CSS (60/40/20) increased greatly from 15 % to 272 % without sacrificing the tensile strength. Besides, the heat distortion temperature (HDT) of PPC/PLA/CSS (60/40/20) was improved to 47.3 °C, which was 20.5 °C higher than that of the neat PPC. These results established a novel and efficient strategy to improve the compatibility of polymer blends and to prepare polymer blends with balanced toughness and stiffness.
一种新型核壳淀粉基纳米粒子（CSS NPs），具有“硬”淀粉核和“软”聚甲基丙烯酸甲酯（PMA）壳，被制备并掺入 PPC/PLA 共混物中。原子力显微镜（AFM）、差示扫描量热法（DSC）和流变学测试表明，CSS NPs 具有优异的增容作用。更重要的是，由于出色的增容作用，所得的 PPC/PLA/CSS 共混物表现出显著改善的力学和热性能。与 PPC/PLA（60/40）相比，PPC/PLA/CSS（60/40/20）的断裂伸长率从 15%大幅增加到 272%，而拉伸强度没有降低。此外，PPC/PLA/CSS（60/40/20）的热变形温度（HDT）提高到 47.3°C，比纯 PPC 高 20.5°C。这些结果为改善聚合物共混物的相容性和制备具有平衡韧性和刚性的聚合物共混物提供了一种新颖有效的策略。
