甲基丙烯酸缩水甘油酯-苯乙烯多单体熔融接枝粉末聚丙烯  

Melt Grafting of Glycidyl Methacrylate and Multi-monomer Styrene onto Polypropylene Powder

作　　者：李书召[1] 肖苗苗[1] 危大福[1] 管涌[1] 郑安呐[1] 胡福增[1] 

机构地区：[1]华东理工大学材料科学与工程学院,超细材料制备与应用教育部重点实验室,上海200237

出　　处：《华东理工大学学报（自然科学版）》2009年第1期44-50,共7页Journal of East China University of Science and Technology

基　　金：国家自然科学基金(50573020)

摘　　要：用转矩流变仪研究了甲基丙烯酸缩水甘油酯(GMA)和粉末聚丙烯(PP)的熔融接枝反应。研究表明:采用粉末PP有利于吸收液态接枝单体,使各组分均匀分散在PP基体中,从而使GMA的接枝效率显著提高。加入第2单体苯乙烯(St)可有效控制PP降解,促进GMA接枝。通过对苯乙烯用量、引发剂用量、温度等影响接枝反应因素的系统研究,确定了优化的熔融接枝反应工艺条件为:在100 g PP粉末中,加入St和GMA各12 g,过氧化二异丙苯DCP 1.4 g,反应温度170℃时,GMA的接枝效率最高,可以达到94.0%,接枝率达11.3%,此时接枝产物的熔体流动速率(MFR)也最小。Melt grafting of glycidyl methacrylate（GMA） grafted onto polypropylene（PP） was studied using a Thermal Haake. The results showed that the grafting efficiency of GMA increased because the absorbed liquid monomers and various compositions could be well dispersed into PP powder. By adding styrene as the comonomer, the grafting efficiency increased also,and the degradation of PP was restrained. Under optimum conditions, the graft efficiency is up to 94.0% with the lowest melt flow rate obtained by studying the amount of styrene（St） and initiator and the reaction temperature. The optimum conditions are 12 g St, 12 g GMA and 1.4 g cumyl peroxide （DCP） on the base of 100 g PP powder at 170 ℃.

关 键 词：粉末聚丙烯 熔融接枝 苯乙烯 甲基丙烯酸缩水甘油酯 

分 类 号：O631.11[理学—高分子化学]