文献类型：期刊文献

中文题名：亚磷酸三苯酯调控聚乳酸/氯化铁共混体系的降解行为和性能

英文题名：Triphenyl Phosphite Regulates Degradation Behavior and Properties of Polylactic Acid/Ferric Chloride Blend

作者：令狐昌开 李小龙 罗筑 杨乐 夏啸松

第一作者：令狐昌开

通信作者：Luo, Zhu

机构：[1]贵州大学材料与冶金学院高分子材料工程系,贵阳550025;[2]贵州理工学院材料与能源工程学院,贵阳550003

第一机构：贵州大学材料与冶金学院高分子材料工程系,贵阳550025

年份：2021

卷号：35

期号：8

起止页码：632-640

中文期刊名：材料研究学报

外文期刊名：Chinese Journal of Materials Research

收录：CSTPCD;;EI(收录号：20213710891821);Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：贵州省科学技术基金(20195607)。

语种：中文

中文关键词：复合材料;聚乳酸;氯化铁;亚磷酸三苯酯;降解行为;力学性能

外文关键词：composite;polylactic acid;ferric chloride;triphenyl phosphite;degradation behavior;mechanical property

摘要：用熔融共混法制备了氯化铁(FeCl_(3))催化聚乳酸(PLA)快速降解材料。PLA材料降解的速率提高了10倍,但是PLA/FeCl_(3)在加工过程中分子量大幅度减小,使力学性能和可加工性能降低。为了减小PLA/FeCl_(3)在熔融加工中的过度降解,将有优良扩链和增塑效果的亚磷酸三苯酯(TPPi)引入PLA/FeCl_(3)体系中,用熔融共混制备TPPi改性PLA/FeCl_(3)材料,使其具有一定的综合力学性能。通过碱溶液降解实验和多种测试研究了样品的降解速率和综合性能。结果表明,TPPi和FeCl_(3)的添加量之比为3∶1的P3-1样品性能最优,拉伸强度和弯曲强度分别达到43.78 MPa和99.04 MPa,在碱液中降解8d其质量损失率为65.76%,远大于纯聚乳酸的4.67%。含2.95 phr FeCl_(3)的样品能在碱液中产生高降解速率,加工时不发生过度降解,由此制备出一种可快速降解并保持良好力学性能的聚乳酸改性材料。
A rapid degradation material,ferric chloride(FeCl_(3))catalyzed polylactic acid(PLA)PLA/FeCl_(3) was prepared by the melt blending method,which presents degradation rate of 10 times higher than that of bare PLA.However,the molecular weight of PLA/FeCl_(3) is greatly reduced during the processing,which results in decrease in mechanical properties and processability.In order to reduce the overdegradation of PLA/FeCl_(3) in melt processing,triphenyl phosphite(TPPi),which has excellent chain extension and plasticizing effect,was introduced into the PLA/FeCl_(3) system and melt blended to improve its comprehensive mechanical properties.The degradation rate and comprehensive performance of the prepared samples were investigated via alkaline solution degradation test and various test methods.The results show that the sample P3-1 had the best performance when the ratio of TPPi to FeCl_(3) was 3∶1,namely,the tensile strength and flexural strength reached 43.78 MPa and 99.04 MPa,respectively.The mass loss rate of degradation for 8d in alkaline solution is 65.76%,which was much higher than that of 4.67%for bare PLA.The sample containing 2.95 phr FeCl_(3) has been able to produce a high degradation rate in the alkaline solution without over-degradation during the processing,thereby obtaining a modified PLA material that can quickly degrade and maintain good mechanical properties.