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Graft polymerization on cellulose derivatives by the transfer reaction
Author(s) -
Richards G. N.
Publication year - 1961
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.1961.070051710
Subject(s) - polymer chemistry , chain transfer , copolymer , polymerization , acrylonitrile , polyacrylonitrile , polystyrene , radical polymerization , styrene , cellulose , chemistry , living polymerization , end group , precipitation polymerization , materials science , organic chemistry , polymer
The deoxy‐di‐ n ‐propylamino (II) and deoxy‐thio (V) derivatives of ethyl cellulose have been prepared. Catalyzed polymerization of acrylonitrile in the presence of (II) results in chain transfer between the polyacrylonitrile radical and the tertiary amino group, with subsequent graft polymerization. A copolymer of ca. 40% polyacrylonitrile grafted on ethyl cellulose was isolated by a combination of fractional precipitation and selective extraction. Polymerization of styrene in presence of (V) results in chain transfer between the polystyrene radical and the thiol groups, with subsequent graft polymerization. Fractional precipitation of the product yielded a fraction whose ethoxyl analysis corresponds to a copolymer of 86% polystyrene grafted on ethyl cellulose.