POE-g-MAH含量对POE/EPDM复合材料相容性、结构及力学性能的影响  

Effects of POE-g-MAH Contents on the Compatibility, Structure and Mechanical Properties of POE/EPDM Composites

作　　者：王臣臣 宋立夫 白楠 于帅 史颖 王元霞 刘立志 宋立新[1,2,3] WANG Chen-chen;SONG Li-fu;BAI Nan;YU Shuai;SHI Ying;WANG Yuan-xia;LIU Li-zhi;SONG Li-xin(Shenyang University of Chemical Technology,Advanced Manufacturing Institute of Polymer Industry,Shenyang 110142,China;Shenyang Institute of Industrial Technology Co.,Ltd.for Advanced Coating Materials,Shenyang 110326,China;Shenyang University of Chemical Technology,College of Materials Science and Engineering,Shenyang 110142,China)

机构地区：[1]沈阳化工大学高分子产业高端制造研究院,辽宁沈阳110142 [2]沈阳先进涂层材料产业技术研究院有限公司,辽宁沈阳110326 [3]沈阳化工大学材料科学与工程学院,辽宁沈阳110142

出　　处：《塑料工业》2021年第12期56-61,共6页China Plastics Industry

基　　金：辽宁省攀登学者,辽宁省教育厅青年科技人才“育苗”项目(LQ2019018,LQ2020007)。

摘　　要：采用熔融共混的方式制备了乙烯-辛烯无规共聚物(POE)/三元乙丙橡胶(EPDM)复合材料,研究了相容剂马来酸酐接枝聚烯烃弹性体(POE-g-MAH)对复合材料的流动性,相容性,结晶结构以及力学性能的影响。结果表明,当添加少量的POE-g-MAH时复合材料的流动性略微增大,随着POE-g-MAH含量的增加,复合材料体系黏度增大,流动性变差;并且复合材料结晶峰半峰宽呈减小的趋势,晶体结构分布变窄。同时小角X射线散射(SAXS)结果说明,POE-g-MAH的加入对复合材料的层状堆积结构影响较小;动态热机械分析(DMA)测试表明,复合材料的储能模量和损耗模量随着POE-g-MAH增加而降低,然而,随着POE-g-MAH含量的增大,EPDM(包含POE)的转变峰略微向低温方向移动,且峰强有所增大,POE的α转变峰的强度呈下降趋势,说明复合材料的相容性得到改善;当加入7份的POE-g-MAH时,复合材料具有最佳的力学性能,在拉伸强度没有降低的条件下,断裂伸长率提高了。Ethylene-octene random copolymer(POE)/ethylene propylene diene rubber(EPDM)composites were prepared by melt blending method.The effects of maleic anhydride grafted polyolefin elastomer(POE-g-MAH)on the fluidity, compatibility, crystal structure and mechanical properties of the composites were studied.The results show that the addition of a small amount of POE-g-MAH leads to better fluidity of the composite.With the increasing contents of POE-g-MAH,the viscosity of the composites increases, leading to the worse fluidity.In addition, the half peak width of the crystal peak decreases and the distribution of crystal structure becomes narrower.The small angle X-ray scattering(SAXS)results show that the addition of POE-g-MAH has almost no effect on the laminar stacking structure of the composite.Dynamic mechanical analysis(DMA)test shows that the storage modulus and loss modulus of the composite decrease with the increase of POE-g-MAH.However, with the increasing contents of POE-g-MAH,the conversion peak of EPDM(including POE)moves slightly to lower temperature and the peak strength increases, while the α conversion peak strength of POE decreases, indicating that the compatibility of composite is improved.The composite with 7 phr of POE-g-MAH exhibits the best tensile properties.The elongation at break of the composite with 7 phr of POE-g-MAH is increased without reducing the tensile strength.

关 键 词：乙烯-辛烯无规共聚物 部分结晶型三元乙丙橡胶 马来酸酐接枝聚烯烃弹性体 相容性 结晶行为 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]