共聚丁烯弹性体增韧等规聚丙烯  

Isotactic Polypropylene Toughened by Polybutene-based Elastomers

作　　者：刘超[1] 马哲 潘莉 李悦生[1] LIU Chao;MA Zhe;PAN Li;LI Yue-sheng(School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学材料科学与工程学院,天津300350

出　　处：《高分子通报》2024年第10期1448-1458,共11页Polymer Bulletin

基　　金：国家自然科学基金(基金号52130307,52022065)。

摘　　要：本文利用吡啶亚胺铪/Ph3CB(C6F5)4催化丁烯与十二烯(C12)、十六烯(C16)、二十烯(C20)无规共聚,合成了一系列侧链长度不同的聚丁烯弹性体(PBE),其最高断裂伸长率和最高弹性恢复率可分别达5000%和88.9%。采用熔融共混法制备了等规聚丙烯(iPP)/PBE共混物,详细研究了PBE添加量、侧链长度和共聚单体插入率对iPP/PBE共混物韧性作用的影响。与纯iPP相比,加入5 wt%共聚单元为C16、插入率为52.3%的聚丁烯弹性体PBE-C16(52.3),可将材料断裂伸长率增加8倍、抗冲强度提高2倍。PBE高弹性恢复能力及其在iPP基体中较小的分散相尺寸有利于提高共混物的韧性。该工作为制备高韧性的聚丙烯合金提供了一种简便有效的方法。A series of long-chain branching polybutene-based elastomers(PBEs)were successfully prepared by incorporating distinct comonomers of 1-dodecene(C12),1-hexadecene(C16),and 1-icosaene(C20).The improved elongation at break of PBE could exceed 5000%,and the best elastic recovery of PBE reached 88.9%.Moreover,PBEs were blended with isotactic polypropylene(iPP)to improve the material toughness.The effects of additional,side chain length,and comonomer incorporation of PBEs on the toughening effect were systematically studied.The results showed that for PBE-C16(52.3)incorporated 52.3 mol%1-hexadecene comonomers,the addition of 5 wt%PBE increased the elongation at break of iPP blend by more than 8 times to 900%and its impact strength increased by 2 times to 15.3 kJ/m2.The high elastic recovery of PBE and its small dispersed phase size are beneficial to the improvement on toughness of the iPP blend material.This work provides a simple and effective method for obtaining iPP blend material with the improved toughness.

关 键 词：聚丁烯弹性体 长链支化 聚丙烯增韧 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]