抗冲击聚丙烯基接枝共聚物的组成和相形态  

Composition and phase morphology of impact PP-based graft copolymer

作　　者：邵禹通 谢晖[2] 程思怡[1] 严海彪[1] 

机构地区：[1]湖北工业大学轻工学部材料学院,绿色轻工材料湖北省重点实验室,湖北省武汉市430068 [2]武汉职业技术学院,湖北省武汉市430074

出　　处：《合成树脂及塑料》2015年第3期57-59,共3页China Synthetic Resin and Plastics

摘　　要：用γ射线辐照等规聚丙烯(i PP)/乙烯-1-辛烯共聚物(POE)/线型低密度聚乙烯(LLDPE)共混体系后,可原位产生多序列接枝共聚物,以增强橡胶相POE与树脂相(i PP,LLDPE)界面相容性,得到新型抗冲击聚丙烯基接枝共聚物(IPGC)。采用差示扫描量热法、傅里叶变换红外光谱和扫描电子显微镜对IPGC的组成及相形态进行了研究。结果表明:IPGC中,PP和LLDPE嵌段长度存在多个分布,在高能辐照过程中,形成了分子链长度不同的乙烯-丙烯接枝共聚物,同时,POE与树脂相也发生交联,形成了接枝共聚物;IPGC以核-壳结构粒子形式均匀分布在i PP基体中,其中LLDPE为核,弹性体POE为壳。A brand-new impact polypropylene-based graft copolymer（IPGC）was produced in situ whenγ-ray irradiation was applied to an isotactic polypropylene（i PP）/ethylene-1-octene copolymer（POE）/linear low-density polyethylene（LLDPE）blend system to obtain multi-sequence graft copolymer with the aim of enhancing the interfacial compatibility between the rubber phase and the resins（i PP and LLDPE）phases. The composition and phase morphology of IPGC were investigated via differential scanning calorimetry（DSC）,Fourier transform infrared spectroscopy（FTIR）and scanning electron microscopy（SEM）. The results show that i PP and LLDPE having different block lengths in IPGC lead to the formation of ethylene-propylene graft copolymer with different chain length during irradiation; furthermore, graft copolymers are formed between POE and the resins by cross-linking. IPGC distributes evenly in i PP matrix as a core-shell structure with core of PE and shell of POE.

关 键 词：等规聚丙烯 乙烯-1-辛烯共聚物 接枝共聚物 Γ射线辐照 共混 核-壳结构 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]