原位增容等规聚丙烯/高密度聚乙烯共混物的制备及性能研究  

Preparation and Property Research of In-Situ Compatibilization Isotactic Polypropylene/High-Density Polyethylene Blends

作　　者：王军[1] 罗筑[1] 杨乐 李小龙 夏啸松 WANG Jun;LUO Zhu;YANG Le;LI Xiao-long;XIA Xiao-song(Guizhou University,Guiyang 550025,China;Guizhou Institute of Technology,Guiyang 550003,China)

机构地区：[1]贵州大学,贵州贵阳550025 [2]贵阳理工学院,贵州贵阳550003

出　　处：《塑料科技》2021年第6期1-6,共6页Plastics Science and Technology

基　　金：基于先进环保微技术处理新型纤维酰胺基的机理及结晶行为研究(黔科合基础[2019]1243);低温等离子改性酰胺基团活性对纤维新材料界面结晶行为机理研究及应用(黔科合平台人才[2018]5778-02)。

摘　　要：以自由基支化反应为基础,在等规聚丙烯/高密度聚乙烯(iPP/HDPE)共混物中加入过氧化物、自由基调节剂和多官能度丙烯酸酯类单体进行共支化反应,以经济便捷的方式原位生成了长链支化共聚物,对iPP/HDPE共混物进行高效增容。结果表明:加入少量的添加剂就能大幅度提升iPP/HDPE共混物的力学性能,如原位增容使iPP/HDPE(50/50)共混物的断裂伸长率和缺口冲击强度提升约3倍。此外,与纯iPP/HDPE共混物相比,改性样品的耐环境应力开裂时间大幅提高,iPP与HDPE的T_(g)靠近,且球晶尺寸变小,表明原位增容极大地改善了iPP/HDPE共混物中iPP与HDPE的相容性。On the basis of free radical branching reactions, the co-branching reaction system of the isotactic polypropylene/high-density polyethylene(iPP/HDPE) blends with the peroxide, free radical regulator and multi-functional acrylate monomer was established to generate in-situ long chain branched copolymers in an economical and convenient way, which could efficiently compatibilize iPP/HDPE blends. The experiment results show that only adding a small amount of additives can greatly improve the mechanical properties of the i PP/HDPE blends. For example, the in-situ compatibilization increase the elongation at break and the notched impact strength of the iPP/HDPE(50/50) blends by about 3 times. In addition, compared with the pure i PP/HDPE blends, the environmental stress cracking time of the modified sample is increased greatly and the T_(g) of iPP and HDPE is close, moreover, spherulite sizes become smaller, which indicate that the insitu compatibilization greatly improve the compatibility of i PP and HDPE in the iPP/HDPE blends.

关 键 词：等规聚丙烯 高密度聚乙烯 共支化反应体系 长链支化共聚物 增容剂 

分 类 号：TB322[一般工业技术—材料科学与工程]