摘要
通过熔融共混制备了马来酸酐接枝三元乙丙橡胶(EPDM-g-MAH),接枝率为1.57%,将其作为共混体系的增容剂,制备了不同EPDM-g-MAH含量的聚乳酸/三元乙丙橡胶(PLA/EPDM)复合材料。利用傅里叶变换红外光谱仪(FTIR)表征马来酸酐(MAH)的接枝量;通过万能拉伸试验机、简支梁冲击试验机、扫描电子显微镜(SEM)和差示扫描量热法(DSC)对PLA/EPDM/EPDM-g-MAH的力学性能、微观形态和非等温结晶进行表征。结果表明:EPDM-g-MAH的加入改善了PLA与EPDM的相容性。EPDM-g-MAH含量为1.0%时,PLA/EPDM/EPDM-g-MAH的断裂伸长率与冲击强度较PLA/EPDM分别提高了136%和103%;体系的结晶度最高。EPDM-g-MAH可提高复合材料的力学性能和结晶性能。
Maleic anhydride grafted ethylene propylene diene monomer(EPDM-g-MAH) was prepared by melt blending,and the grafting rate was 1.57%.The polylactic acid/ethylene propylene diene monomer(PLA/EPDM) composites with different EPDM-g-MAH contents were prepared by using EPDM-g-MAH as compatibilizer.The grafting amount of maleic anhydride(MAH) was characterized by Fourier transform infrared spectroscopy(FTIR).Mechanical properties,microstructure and non-isothermal crystallization of PLA/EPDM/EPDM-g-MAH were characterized by universal tensile testing machine,simply supported beam impact testing machine,scanning electron microscope(SEM) and differential scanning calorimetry(DSC).The results show that the addition of EPDM-g-MAH improves the compatibility between PLA and EPDM.When the content of EPDM-g-MAH is 1.0%,elongation at break and impact strength of PLA/EPDM/EPDM-g-MAH are 136% and 103% higher than those of PLA/EPDM,respectively.The crystallinity of system is the highest.EPDM-g-MAH can improve mechanical properties and crystallization properties of composites.
作者
郝晓唱
毛晨
谭庆
龚兴厚
HAO Xiao-chang;MAO Chen;TAN Qing;GONG Xing-hou(Hubei Provincial Key Laboratory of Green Materials for Light Industry,Hubei University of Technology,Wuhan 430068,China;Collaborative Innovation Center of Green Light-Weight and Processing,Hubei University of Technology,Wuhan 430068,China;School of Materials and Chemical Engineering,Hubei University of Technology,Wuhan 430068,China)
出处
《塑料科技》
CAS
北大核心
2023年第7期58-61,共4页
Plastics Science and Technology
关键词
聚乳酸
三元乙丙橡胶
马来酸酐
相容性
力学性能
结晶性能
Polylactic acid
Ethylene propylene diene monomer
Maleic anhydride
Compatibility
Mechanical properties
Crystallization properties
作者简介
联系人:龚兴厚,gongxh@hbut.edu.cn。
