文献类型：期刊文献

英文题名：Relationship between Peroxide Initiators and Properties of Styrene Grafted Polypropylene via Reactive Extrusion

作者：Zhou, Shuai[1,3];Zhou, Jun[3];Li, Lu[1,3];Zhao, Shicheng[1,3];Shi, Yaoqi[1,2];Xin, Zhong[1,3]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai, Peoples R China;[2]Shanghai Res Inst Chem Ind, Shanghai Key Lab Catalysis Technol Polyolefin, Shanghai, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai, Peoples R China

年份：2018

卷号：57

期号：5

起止页码：377

外文期刊名：JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS

收录：;EI(收录号：20182005206169);WOS:【SCI-EXPANDED(收录号:WOS:000435693300005)】；

基金：The authors thank the Fundamental Research Funds for The Central Universities of China (Grants NO. 22A201514016 and 222201314051), and National Natural Science Funds of China (Grants NO. 21606084, 21476085 and 21306047) for financial support.

语种：英文

外文关键词：Crystallization behavior; grafting; initiators; polypropylene; rheological properties

摘要：To understand the relationship between the initiators and the properties of grafted polypropylene (PP), and provide guidance for designing polymers with different performance through selecting appropriate initiators, a series of styrene (St) grafted PP was prepared by modifying commercial linear PP via reactive extrusion using two different peroxide initiators, dicumyl peroxide (DCP) and benzoyl peroxide (BPO). Fourier transform infrared spectra indicated that the use of DCP led to a higher St grafting degree compared to the system using BPO. The melt flow index and rheological characteristics suggested the existence of short chain branching (SCB) structures in the St grafted PP using DCP, and long chain branching (LCB) structures in the St grafted PP using BPO. Differential scanning calorimetry and polarized optical microscopy results showed that the degradation of the PP chains and the introduction of SCB structures hindered the crystallization process of the St grafted PP using DCP, and the existence of the LCB structures accelerated the crystallization process of the St grafted PP using BPO. We suggest this research can contribute to the understanding of methods to prepare grafted PP with special properties via reactive extrusion by using proper initiators.