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Polypropylene with high melt flow rate and high isotacticity prepared by phosphate-mixed external donors
Zhou, Qian1; Xu, Hao1; Wang, Ailian1; Ma, Zhifeng2; Li, Huayi2; Zhang, Liaoyun1; Hu, Youliang2
2017-04-15
Source PublicationJOURNAL OF APPLIED POLYMER SCIENCE
Volume134Issue:15
AbstractHigh 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.
KeywordPolyolefins Stereochemistry And Tacticity Structure-property Relationships Synthesis And Processing Techniques
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/38057
Collection工程塑料实验室
Affiliation1.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
Recommended Citation
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).
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