Polypropylene with high melt flow rate and high isotacticity prepared by phosphate-mixed external donors

	Polypropylene with high melt flow rate and high isotacticity prepared by phosphate-mixed external donors
	Zhou, Qian 1; Xu, Hao 1; Wang, Ailian 1; Ma, Zhifeng 2; Li, Huayi 2; Zhang, Liaoyun 1; Hu, Youliang 2
刊名	JOURNAL OF APPLIED POLYMER SCIENCE
	2017-04-15
卷号	134 期号:15
关键词	Polyolefins Stereochemistry And Tacticity Structure-property Relationships Synthesis And Processing Techniques
英文摘要	High melt flow rate (MFR) of polypropylene can improve its processability and its high isotacticity is favor of keeping good mechanical properties of polypropylene. In this study, as a convenient and effective method, the mixture of phosphate and alkoxysilane as mixed external donors for Ziegler-Natta catalyst is used to improve MFR of polypropylene. The MFR of polypropylenes prepared by mixed external donors is three to five time higher than that prepared by dicyclopentyl dimethoxysilane (Donor-D) alone, which is attributed to broad molecular weight distribution and low molecular weight of polypropylene prepared by mixed external donors. In addition, isotacticity and lamella thickness of polypropylene prepared by mixed external donors containing triisopropyl phosphate or phenyl-phosphonic acid dipentyl ester are very close to that prepared by Donor-D, which lead to keep high thermal properties and good mechanical properties for the polypropylenes. (C) 2017 Wiley Periodicals, Inc.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38057]
专题	化学研究所_工程塑料实验室
作者单位	1.Univ Chinese Acad Sci, Coll Chem & Chem Engn, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Chem, CAS Key Lab Engn Plast, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Qian,Xu, Hao,Wang, Ailian,et al. Polypropylene with high melt flow rate and high isotacticity prepared by phosphate-mixed external donors[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2017,134(15).
APA	Zhou, Qian.,Xu, Hao.,Wang, Ailian.,Ma, Zhifeng.,Li, Huayi.,...&Hu, Youliang.(2017).Polypropylene with high melt flow rate and high isotacticity prepared by phosphate-mixed external donors.JOURNAL OF APPLIED POLYMER SCIENCE,134(15).
MLA	Zhou, Qian,et al."Polypropylene with high melt flow rate and high isotacticity prepared by phosphate-mixed external donors".JOURNAL OF APPLIED POLYMER SCIENCE 134.15(2017).