RHDPE/协同改性杨木纤维复合材料力学性能及结晶动力学探索  

Research on Mechanical Properties and Crystallization Kinetics of RHDPE/Synergetic Modified Poplar Fiber Composites

作　　者：陈阳 董和生 叶勇 吴正环[1,2,3,4] 吾兰 Chen Yang;Dong Hesheng;Ye Yong;Wu Zhenghuan;Wu Lan(School of Mechanic and Engineering,Tianjin University of Technology and Education,Tianjin 300222,China;National-Local Joint Engineering Laboratory of Intelligent Manufacturing Oriented Automobile Die&Mould,Tianjin 300222,China;National Mold Product Quality Supervision&Inspection Center,Dongguan 523841,China;Key Laboratory of Tianjin Automobile Injection Mold Enterprise,Tianjin 300222,China)

机构地区：[1]天津职业技术师范大学机械工程学院,天津300222 [2]汽车模具智能制造国家地方联合工程实验室,天津300222 [3]国家模具产品质量监督检验中心,广东东莞523841 [4]天津市汽车轻量化注塑模具企业重点实验室,天津300222

出　　处：《塑料科技》2019年第11期48-53,共6页Plastics Science and Technology

基　　金：大学生创新创业训练计划项目(GJ201733);天津职业技术师范大学“me+”创客空间项目(20172102);天津市教委科研计划项目(2017KJ104);天津高校科技发展基金项目(JWK1711);天津职业技术师范大学研究发展项目(XJKC031420,XJKC031451,KJ11-06,KJY14-03)

摘　　要：为增强增韧回收高密度聚乙烯(RHDPE),采用硅烷偶联剂(SCA)和马来酸酐接枝聚乙烯(MAH-g-PE)对杨木纤维(PF)进行了协同表面改性,考察了改性剂配比对协同改性PF填充RHDPE复合材料(RHDPE/SCA-PF/MAH-g-PE)力学性能的影响,并对复合材料的结晶性能进行了研究。结果表明:加入MAH-g-PE后,复合材料的拉伸与冲击性能明显提升,同时,材料的熔融温度提升、结晶温度下降,并出现晶区紊乱、晶粒尺寸差异较大的现象。非等温结晶动力学研究结果显示,当MAH-g-PE添加量超过临界值时,能够抑制PF在基体中的异相成核,促使HDPE形成更加完善的结晶。In order to reinforce and toughen the recycled high density polyethylene(RHDPE), the surface of poplar fiber(PF) was synergetic modified by silane coupling agent(SCA) and maleic anhydride grafted polyethylene(MAH-g-PE) with different ratios. The mechanical and crystallization properties of the RHDPE composites filled with synergetic modified PF(RHDPE/SCA-PF/MAH-g-PE) were researched. The results show that: the tensile and impact performances of the composites increase obviously after adding MAH-g-PE, the melting temperature rises, the crystallization temperature reduces, and shows disordered crystalline and inconsistent crystal size. The research on non-isothermal crystallization kinetics indicates that the heterogeneous nucleation of PF can be restrained and the crystal perfection of HDPE improves when the MAHg-PE content exceeds the critical value.

关 键 词：回收高密度聚乙烯 协同表面改性 力学性能 结晶性能 非等温结晶 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]