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Cationic cyclization of neoprene with a diethylaluminum chloride and organic chloride catalyst system
Author(s) -
Wang Chaoyang,
Huang Xuepin,
Yang Jihua
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.11196
Subject(s) - cationic polymerization , chloride , chemistry , gel permeation chromatography , allyl chloride , solvent , catalysis , polymer chemistry , solubility , differential scanning calorimetry , intrinsic viscosity , organic chemistry , polymer , physics , thermodynamics
The cyclization of neoprene was achieved with the aid of a cationic catalyst system based on diethylaluminum chloride (Et 2 AlCl) and an organic chloride, allyl chloride (CH 2 CHCH 2 Cl) or benzyl chloride (C 6 H 5 CH 2 Cl). The main parameters of the cyclization process were investigated. Elastomers with low intrinsic viscosity, ready solubility and some gelling were obtained. Xylene was a good solvent for the cyclization process, which took place in a very short time (≤5 min). The products were characterized with IR, 1 H‐NMR, differential scanning calorimetry, and gel permeation chromatography. The polycyclic structure was determined. The degree of cyclization and the incorporated solvent content were estimated with a 1 H‐NMR method. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 2227–2231, 2002
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