RHDPE/协同表面改性碳酸钙复合材料的力学性能与结晶性能研究  

Study on Mechanical Properties and Crystallization Properties of RHDPE/Synergistic Surface Modifi ed CaCO3 Composites

作　　者：吴正环 赵学礼[4] 王权 王睿[2] 董和生 刘思慧[2] 陈阳 叶勇 Wu Zhenghuan;Zhao Xueli;Wang Quan;Wang Rui;Dong Heshen;Liu Sihui;Chen Yang;Ye Yong(National-Local Joint Engineering Laboratory of Intelligent Manufacturing Oriented Automobile Die &Mould,Tianjin 300222,China;School of Mechanic and Engineering,Tianjin University of Technology and Education,Tianjin 300222,China;Key Laboratory of Tianjin Automobile Injection Mold Enterprise,Tianjin 300222,China;Logistics Management Department,Tianjin University of Technology and Education,Tianjin 300222,China)

机构地区：[1]汽车模具智能制造国家地方联合工程实验室,天津300222 [2]天津职业技术师范大学机械工程学院,天津300222 [3]天津市汽车轻量化注塑模具企业重点实验室,天津300222 [4]天津职业技术师范大学后勤管理处,天津300222

出　　处：《塑料科技》2018年第12期52-57,共6页Plastics Science and Technology

基　　金：天津市智能制造重大专项(17ZXZNGX00100);天津市高校“中青年骨干创新人才培养计划”(RC180202);天津市教委科研计划项目(2017KJ104,2017KJ109,2017KJ101);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);国家级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)

摘　　要：为增强增韧再生高密度聚乙烯(RHDPE),探索了不同配比下硅烷偶联剂(SCA)与马来酸酐接枝聚乙烯(PEg-MAH)协同表面改性碳酸钙(CaCO3)与RHDPE复合材料的力学性能,并对其结晶性能进行了研究。结果表明:当RHDPE为75份,CaCO3为25份,无论SCA含量为CaCO3的0.5%、1%或1.5%时,都存在某一种含量的PE-g-MAH能使RHDPE/CaCO3复合材料的拉伸性能与弯曲性能比纯RHDPE有较高提升。随着PE-g-MAH含量的增多,RHDPE/CaCO3复合材料的熔融温度逐渐升高,结晶度逐渐增大。升降温速度加快后会使RHDPE/CaCO3复合材料的熔融温度升高,结晶温度下降,并且引起晶区紊乱,结晶粒径差异大的情况。In order to reinforce and toughen RHDPE, the mechanical properties of the surface-modified RHDPE/CaCO3 composites synergistically modified by silane coupling agent (SCA) and maleic anhydride grafted polyethylene(PE-g-MAH) at different ratios were investigated, and their crystallization properties were studied. The results show that: when the RHDPE content is 75 phr, and the CaCO3 content is 25 phr, whether the SCA content is 0.5%, 1%, or 1.5% of the CaCO3, there always exist a curtain content of PE-g-MAH, which can greatly increase the tensile properties and flexural strength of RHDPE/CaCO3 composites than those of pure RHDPE. With the increase of PE-g-MAH content, the melting temperature of RHDPE/CaCO3 composites and the crystallinity increase. The melting temperature of RHDPE/CaCO3 increases and the crystallization temperature decreases with the increase of heating and cooling rate, which leads to the disorder of crystal zone and the large difference of crystal size.

关 键 词：再生高密度聚乙烯 协同表面改性 力学性能 结晶性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]