期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 26, 页码 6683-6686出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201403491
关键词
copolymers; polyethylene; polymerization; RAFT; vinyl acetate
资金
- Universite Claude Bernard Lyon I
- ANR
- competitiveness cluster AXELERA
- competitiveness cluster PLASTIPOLIS [ANR 2011 JS08 008 01]
The present paper reports the first example of a controlled radical polymerization of ethylene using reversible addition-fragmentation chain transfer (RAFT) in the presence of xanthates (Alkyl-OC(=S)S-R) as controlling agents under relative mild conditions (70 degrees C, < 200 bars). The specific reactivity of the produced alkyl-type propagating radicals induces a side fragmentation reaction of the stabilizing O-alkyl Z group of the controlling agents. This fragmentation, rarely observed in RAFT, was proven by NMR analyses. In addition, semicrystalline copolymers of ethylene and vinyl acetate were also prepared with a similar level of control.
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