Aqueous Dispersions of Multiphase Polyolefin Particles

被引：8
|
作者：
Godin, Alexandra [1 ]
Mecking, Stefan [1 ]
机构：
[1] Univ Konstanz, Dept Chem, Chair Chem Mat Sci, D-78464 Constance, Germany
来源：
MACROMOLECULES | 2016年 / 49卷 / 21期
关键词：
HIGH-DENSITY POLYETHYLENE; CATALYTIC COPOLYMERIZATION; ETHYLENE POLYMERIZATION; IMPACT PROPERTIES; NI(II) CATALYSTS; NANOPARTICLES; EMULSION; BLENDS; COMPLEXES; NORBORNENE;
D O I：
10.1021/acs.macromol.6b01818
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Multiphase polyolefin particles consisting of polyethylenes with different microstructures were synthesized using [kappa(2)-(N,O)Ni(II)-Me(L)] catalyst precursors via a two-step dispersion-based approach. First, crystalline seed particles were directly generated by aqueous polymerization of ethylene using a water-soluble catalyst precursor or via miniemulsion polymerization. The second softer dispersed phase, consisting of a low crystalline highly branched low molecular weight polyethylene or ethylene-norbornene copolymer, was generated in the presence of this seed via aqueous polymerization using a second water-soluble catalyst precursor or via miniemulsion polymerization. Particles with different nanoscale morphologies, namely core-shell, "dumbbell" or "sea urchin"-like, were formed as observed by TEM and AFM. The obtained nanocomposite dispersions formed continuous semicrystalline films.
引用
收藏
页码：8296 / 8305
页数：10
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