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Synthesis and gas permeability of membranes of silyl‐substituted poly( p ‐phenylenevinylene)s
Author(s) -
Sakaguchi Toshikazu,
Koide Yohei,
Hashimoto Tamotsu
Publication year - 2010
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.32135
Subject(s) - silylation , oxygen permeability , polymer chemistry , thermal stability , alkyl , polymer , thermogravimetric analysis , membrane , chemistry , permeability (electromagnetism) , materials science , oxygen , organic chemistry , catalysis , biochemistry
p ‐Bis(bromomethyl)benzene with silyl groups [SiMe 3 ( 2a ), SiEt 3 ( 2b ), SiMe 2 ‐ t ‐Bu ( 2c ), SiMe 2 ‐ n ‐Bu ( 2d ), SiMe 2 ‐ n ‐C 8 H 17 ( 2e ), SiMe 2 ‐ n ‐C 18 H 37 ( 2f )] were polymerized by a modified Gilch route to afford silyl‐substituted poly( p ‐phenylenevinylene)s ( 3a – f ). The polymer containing SiMe 3 groups ( 3a ) was insoluble in any solvents, while the other polymers ( 3b – f ) were soluble in organic solvents. They had relatively high molecular weight over 3.6 × 10 4 , and gave free‐standing membranes by solution casting method. According to thermogravimetric analysis (TGA), the silyl‐substituted poly( p ‐phenylenevinylene)s showed high thermal stability ( T d ≥ 300°C). The oxygen permeability coefficients of membranes of the silyl‐substituted poly( p ‐phenylenevinylene)s ( 3b – f ) were in the range of 3.5–12 barrers, and the poly( p ‐phenylenevinylene)s with long alkyl silyl groups, 3e and 3f , exhibited the highest gas permeability among them. This is the first report on gas permeability of poly( p ‐phenylenevinylene)s. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010