![3-[(4-Nitrobenzyl)oxy]-3-oxopropanoic Acid structure](https://cnstatic.chemtradehub.com/structs/773/77359-11-6-0d04.webp "3-[(4-Nitrobenzyl)oxy]-3-oxopropanoic Acid structure")
Sequential two-stage polymerization for synthesis of isotactic polypropylene/isotactic polybutene-1 alloys: composition, morphology and granule growing mechanism
文献信息
发布日期
2015-03-06
DOI
10.1039/C5PY00205B
影响因子
5.582
作者
Baiyu Jiang, Huafeng Shao, Huarong Nie, Aihua He
查看原文
摘要
In this paper, a crystalline/crystalline polyolefin alloy – isotactic polypropylene/ isotactic polybutene-1 (iPP/iPB) in-reactor alloy with spherical particle morphology – were synthesized by sequential two-stage polymerization using a spherical MgCl2-supported Ziegler–Natta catalyst. The iPP/iPB alloys obtained were mainly composed of isotactic polybutene-1, isotactic polypropylene and polypropylene-block-poly(butene-1) block copolymers, which occupied more than 95 wt% of the total alloy. A possible polymerization mechanism was proposed to explain the block copolymer formation. The morphologies of original alloy particles and n-heptane-extracted alloy particles were characterized by SEM and a particle growth model of iPP/iPB alloy was proposed to illustrate the sequential two-stage polymerization mechanism and active-species distribution during this process.
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来源期刊
Polymer Chemistry
CiteScore:
8.6
自引率:
7.3%
年发文量:
457
Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.
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