文献类型：期刊文献

中文题名：PGS-PLA共混材料的制备和性能

英文题名：Preparation and Characterization of PGS-PLA Blend Composite

作者：桂宗彦[1];陆冲[1];李勇锋[1];程树军[1]

机构：[1]华东理工大学材料科学与工程学院,超细材料制备与应用教育部重点实验室,上海200237

年份：2009

卷号：35

期号：1

起止页码：57

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：聚癸二酸甘油酯;聚乳酸;共混改性

外文关键词：poly（glycerol sebacate）; poly（lactic acid）; blending modification;

摘要：以聚癸二酸甘油酯(PGS)和聚乳酸(PLA)为原料在Haake转矩流变仪中密炼制备了不同配比的PGS-PLA共混材料。研究了共混材料的转矩流变性能、热性能、力学性能及其共混形态。结果表明PGS-PLA共混材料的转矩流变过程与PLA有很大差异,其熔融塑化过程大幅延长。DSC分析表明:随着PGS含量的增加,PGS-PLA共混材料的玻璃化温度、结晶温度和熔融温度降低,而结晶度提高;共混材料的冲击强度最大可以达到65.6 J/m,较纯PLA提高了447%;SEM观测表明PGS和PLA是分相的,且随PGS含量的提高,PGS分散相尺寸变大,混合效果变差。
Poly（glycerol sebacate） （PGS） and poly（lactic acid） （PLA） were blended at different compositions in a Haake internal mixer. The torque rheological properties, thermal properties, mechanical properties and morphologies of PGS-PLA blends were studied. The torque rheological processes of the blends were different from neat PLA, which had a long low-torque process between the leading peak and the fusion peak of PLA. Differential scanning calorimetry （DSC） results show the glass transition temperature, crystalline temperature and melt temperature of PLA dropped and the crystallinity increased as blending with PGS. Izod impact measurements indicate that the impact resistance of the blends reaches 65.6 J/m, 447~ higher than the value of neat PLA. Scanning electron microscopy （SEM） reveals that PGS and PLA are phase-separated. With the increasing of the PGS content, the domain size of the PGS dispersed phase comes larger and the blend effect turns poorer.