不同相容剂改性PLA/微米CaCO3的结晶与力学性能  

Crystallization and mechanical properties of PLA/micro-CaCO3 modified with different compatibilizers

作　　者：李美 谭嘉礼 卢智伟 李浩楠 伍泽雄 麦堪成[2] LI Mei;TAN Jiali;LU Zhiwei;LI Haonan;WU Zexiong;MAI Kancheng(School of Chemical Engineering and Technology, Guangdong Industry Technical College∥Technology Development Center for Polymer Processing Engineering ofGuangdong Colleges and Universities∥Advance Technology DevelopmentCenter for Polymer Processing Engineering of Guangdong, Guangzhou 510300, China;Materials Science Institute, School of Chemistry, Sun Yat-sen University∥ Key Laboratory ofPolymeric Composites and Functional Materials of Ministry of Education∥Guangdong Provincial KeyLaboratory of High Performance Resin-based Composites, Guangzhou 510275, China)

机构地区：[1]广东轻工职业技术学院∥广东高校高分子材料加工工程技术开发中心∥广东省高分子材料先进加工工程技术研究中心,广东广州510300 [2]中山大学化学院材料科学研究所∥聚合物基复合材料及功能材料教育部重点实验室∥广东省高性能树脂基复合材料重点实验室,广东广州510275

出　　处：《中山大学学报（自然科学版）》2019年第3期71-78,共8页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：2017年度广东轻工职业技术学院人才类项目(KYRC2017-0013);广东省教育厅项目(2017GkQNCX005)

摘　　要：为增加PLA/微米CaCO3复合材料的界面作用,提高PLA韧性,采用POE-g-MAH和EVA-g-MAH增容改性PLA/微米CaCO3复合材料,并对比研究了两种相容剂对PLA/微米CaCO3复合材料的结晶和力学性能的影响。DSC和XRD结果证实采用POE-g-MAH增容PLA/微米CaCO3明显提高PLA的结晶速率和结晶度,当微米CaCO3填充量为w=40%时,PLA的结晶度从2.0%提高到45.8%;而采用EVA-g-MAH增容PLA/微米CaCO3对PLA结晶性能影响不大。力学实验表明采用EVA-g-MAH增容PLA/微米CaCO3复合材料增韧效果优于POE-g-MAH增容PLA/微米CaCO3复合材料。In order to strength the interfacial effect of PLA/micro-CaCO 3 and improve the toughness of PLA, PLA/micro-CaCO 3 composites were prepared with POE-g-MAH and EVA-g-MAH. The crystallization and mechanical properties of the PLA/micro-CaCO 3 composites modified with different compatibilizers were compared. DSC and XRD results suggest that the addition of POE-g-MAH remarkably improve the crystallization rate and crystallinity of PLA/micro-CaCO 3 composites. When the filling content of micro-CaCO 3 reach 40%, the crystallinity of PLA can be improved from 2.0% to 45.8%. While the addition of EVA-g-MAH has little effect on the crystallization of PLA/micro-CaCO 3. Mechanical tests indicate that EVA-g-MAH has better effect than POE-g-MAH on toughing the PLA/micro-CaCO 3 composites.

关 键 词：聚乳酸 微米CaCO3 大分子相容剂 增韧 复合材料 

分 类 号：O631.2[理学—高分子化学]