文献类型：期刊文献

英文题名：Influence of different functionality degree grafting monomers on polypropylene melt radical branching reaction and their structure

作者：Zhang, Chun Yang, Le He, Li Gong, Wei Luo, Zhu Liu, Wei

第一作者：张纯

通信作者：Zhang, C[1]|[14440f6a6d277849ce3bf]张纯;

机构：[1]Guizhou Inst Technol, Sch Mat & Met Engn, Caiguan Rd 1, Guiyang 550003, Guizhou, Peoples R China;[2]Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Guizhou, Peoples R China

第一机构：贵州理工学院材料与冶金工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mat & Met Engn, Caiguan Rd 1, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院材料与冶金工程学院;贵州理工学院;

年份：2018

卷号：29

期号：1

起止页码：551-559

外文期刊名：POLYMERS FOR ADVANCED TECHNOLOGIES

收录：;EI(收录号：20173804185935);Scopus(收录号：2-s2.0-85029547777);WOS:【SCI-EXPANDED(收录号:WOS:000418367000057)】；

基金：This work is financially supported by the Major Special Project of Guizhou Province, grant no. Qiankehe [2012]6023 and The Provincial Program on Science and Technology Project of Guizhou Province, grant no. Qiankehe ZC[2016]2806. We thank W.S. Bu of Institute of Chemistry Chinese Academy of Sciences for helping with the HTGPC measurements.

语种：英文

外文关键词：degree of functionality; grafting monomer; long-chain branch (LCB); polypropylene (PP)

摘要：Long-chain-branched polypropylene (LCBPP) is one of polypropylenes (PPs) with high melt strength and good melt elasticity. Recently, due to its outstanding properties, LCBPP have been attracted increasingly attention in the field of development and characterization by the researchers all over the world. In this study, LCBPP was prepared by the melt radical branching reaction in a torque rheometer. The influences of various acrylate monomers with different functionality degrees on the structure and melt performance of PP products were investigated. The results indicated that grafting monomers with different functionality degrees made diverse influences on the branching density and branching chain length of branching PP products. With the increase of the functionality degree of grafting monomers, the branching level of PP products increased gradually and the multiplicity of branches became increasingly obvious. Besides, a higher reactivity of pentaerythritol triacrylate with hydroxyl than the similar molecular structured pentaerythritol tetraacrylate was confirmed. Furthermore, due to the high reactivity of dipentaerythritol penta(hexa)acrylate, branching and crosslinking reaction occurred simultaneously during the reaction process. As a result, the gel content increased and finally formed highly star branching structures with a shape of dense and short.