PP/OBC/EPDM-g-MAH复合材料的制备及性能  

Study on Properties of PP/OBC/EPDM-g-MAH Composites and Its Preparation

作　　者：张华集[1] 陈鹏[1] 张雯[1] 陈晓[1] 李国标[1] 

机构地区：[1]福建师范大学材料科学与工程学院福建省高分子材料重点实验室,福建福州350007

出　　处：《塑料科技》2012年第11期49-52,共4页Plastics Science and Technology

基　　金：福建省科技厅项目(2012 H6005)

摘　　要：以聚丙烯(PP)为基体材料,乙烯-辛烯嵌段共聚物(OBC)为增韧材料,三元乙丙橡胶接枝马来酸酐共聚物(EPDM-g-MAH)为相容剂,制备了PP/OBC/EPDM-g-MAH复合材料。用DSC、SEM、转矩流变仪分析了OBC及EPDM-g-MAH对PP结晶性能、断面相结构、流变性能的影响,测试了复合材料的力学性能。结果表明:加入15%OBC,PP/OBC复合材料的熔融温度升高了1.63℃,结晶度降低了5.4%,断裂伸长率及缺口冲击强度明显提高,弯曲强度和拉伸强度有所下降;含4%EPDM-g-MAH的PP/OBC/EPDM-g-MAH复合材料,OBC粒子均匀分散在PP基体中,粒径明显细化,熔融塑化扭矩值降低,结晶速率加快;与纯PP相比,断裂伸长率和缺口冲击强度分别提高了128.57%和107.96%,柔韧性有较大幅度提高。The PP/OBC/EPDM-g-MAH composites were prepared by using maleic anhydride grafted ethylenepropylene-diene monomer （EPDM-g-MAH） as compatibilizer, PP as matrix material, and ethyleneoctene block copolymer （OBC） as toughening agent. The effects of OBC and EPDM-g-MAH on the crystalline behavior, morphology, and rheological behavior of the composites were analyzed and the mechanical properties were also tested by use of DSC, SEM and torque reometer. The mechanical properties of the blends were also tested. The results indicate that： by adding with 15% OBC, the melting temperature of PP/OBC blends increases by 1.63~C, the crystallization degree decreases by 5.4%, and the notched impact strength and elongation at break increase obviously, while the tensile strength and flexural strength decrease slightly; when adding with 4% EPDM- g-MAH, OBC particles disperse evenly in the PP matrix material, particle size is refined, torque values decreases, and crystalline rate of PP increases evidently; compared with pure PP, the elongation at break and notched impact strength of the composites increase by 128.57% and 107.96% respectively, and the flexibility improves substantially.

关 键 词：聚丙烯 乙烯.辛烯嵌段共聚物 三元乙丙橡胶接枝马来酸酐共聚物 复合材料 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]