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Synthesis of poly( p ‐xylylene)s by base‐induced 1,6‐dehydrohalogenation – Control of the degree of polymerization
Author(s) -
Schäfer Oliver,
BrinkSpalink Friedel,
Greiner Andreas
Publication year - 1999
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19990401)20:4<190::aid-marc190>3.0.co;2-z
Subject(s) - dehydrohalogenation , polymerization , polymer chemistry , xylylene , base (topology) , degree (music) , peroxide , chemistry , degree of polymerization , benzoyl peroxide , polymer , organic chemistry , catalysis , mathematics , mathematical analysis , physics , acoustics
Phenylethyl‐substituted poly( p ‐xylylene) (PEPPX) was prepared by base‐induced 1,6‐dehydrohalogenation of the corresponding 4‐chloromethyltoluene. Very high degrees of polymerization of about 3150 were obtained already at low conversions. Several standard retarders for radical polymerizations failed to limit the degree of polymerization significantly. However, best control was accomplished by the addition of dibenzoyl peroxide. The degree of polymerization of PEPPX was depressed to about 110 by addition of 10–15 mol‐% of dibenzoyl peroxide.