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Ionic graft copolymerization. VI. Graft copolymerization of β‐propiolactone and N ‐vinylcarbazole onto trunk polymer containing carboxylic acid, sulfonic acid, and their salts
Author(s) -
Shiota Tetsuya,
Goto Yutaka,
Hayashi Koichiro,
Okamura Seizo
Publication year - 1968
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.1968.070121107
Subject(s) - cationic polymerization , copolymer , polymer chemistry , sulfonic acid , polymerization , polymer , divinylbenzene , chemistry , styrene , anionic addition polymerization , carboxylic acid , organic chemistry
It was pointed out in previous papers that both cationic and anionic polymerization might be involved simultaneously in grafting onto trunk polymers containing COOH or SO 3 Na. The graft copolymerization of β‐Propiolactone (βPL)– N ‐vinylcarbazole (NVCZ) onto styrene‐divinylbenzene copolymers containing carboxylic acid, sulfonic acid, and their salts was carried out in order to distinguish between the polymers produced by anionic and cationic mechanisms. The polymer obtained by the polymerization of βPL–NVCZ with BF 3 ·OEt 2 , a typical cationic catalyst, consisted mainly of NVCZ units, but the polymer obtained with BuLi, a typical anionic catalyst, consisted mainly of βPL units. In the graft copolymerization of NVCZ–βPL onto trunk polymer containing COOH, the NVCZ contents of the branch polymer and the tolueneinsoluble fraction were estimated to be ca. 50 mole‐%; therefore these polymers were produced by both cationic and anionic mechanisms. In the case of graft copolymerization onto the trunk polymer containing SO 3 Na, it was found that both cationic and anionic polymerization also occurred simultaneously.