文献类型：期刊文献

中文题名：PCL-PEG-PCL/PLA共混材料的制备与性能分析

英文题名：Preparation and Property Analysis of Poly(ε-caprolactone)-Poly(ethylene glycol)-Poly(ε-caprolactone)/Polylactide Blends

作者：温广文[1];夏浙安[1];陈建定[1]

机构：[1]华东理工大学材料科学与工程学院,上海200237

年份：2017

卷号：43

期号：4

起止页码：487

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：北大核心:【北大核心2014】；CSCD:【CSCD_E2017_2018】；

语种：中文

中文关键词：聚乳酸;共混;微观形貌;结晶;拉伸性能

外文关键词：PLA;;blend;;morphology;;crystallization;;tensile properties

摘要：为了拓宽聚乳酸(PLA)在生物医学领域的应用,使用少量钛酸异丙酯改性相对分子质量为2 000的聚乙二醇(PEG-2000)引发己内酯开环聚合得到相对分子质量为6 000的生物可降解三嵌段共聚物聚己内酯-聚乙二醇-聚己内酯(PCEC),分别将PCEC、PEG-6000与PLA共混,考察其微观形貌、结晶性能、力学性能的区别。结果显示PCEC/PLA共混物的微观形貌是典型的"海岛"结构;在相同配比下,PCEC促进PLA结晶的能力要小于PEG-6000。当PCEC和PLA的质量比为15∶85时,PCEC/PLA共混物的断裂伸长率最佳,相同质量比下的PEG-6000/PLA共混物的断裂伸长率比PCEC/PLA共混物的断裂伸长率要高7%,而拉伸强度要低50%。
To broaden the application of polylactide(PLA)in biomedical field,initiator PEG-2000 modified by titanium isopropoxide was introduced to the ring opening polymerization of caprolactone.A biodegradable triblock poly(ε-caprolactone)-poly(ethylene glycol)-poly(ε-caprolactone)(PCEC)was synthesized.The morphology,crystallization and tensile properties of PCEC/PLA blends with varied concentration of PCEC were investigated by comparison with PEG-6000/PLA blends.The SEM images show that PCEC/PLA blends exhibit a typical sea-island morphology with PCEC finely dispersed in PLA matrix as droplets.The crystallization ability of PLA in PCEC/PLA blends is weaker than PLA in PEG-6000/PLA.When the mass ratio of additive and PLA is 15∶85,the elongation at break of PEG-6000/PLA blend is 7% higher than PCEC/PLA while the tensile strength is 50%lower.