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Synthesis of poly(vinyl acetate) by degenerative transfer polymerization in the presence of iodine
Author(s) -
Xu Wenjing,
Zhang Wensheng,
Li Wei,
Yan Jinlong,
Shen Guoyu,
Li Jun
Publication year - 2012
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.36664
Subject(s) - vinyl acetate , dispersity , polymer chemistry , polymerization , chemistry , radical polymerization , iodine , molar mass distribution , radical , adduct , organic chemistry , copolymer , polymer
Polymerization of vinyl acetate initiated by 2,2′‐azobis(isobutyronitrile) at 75°C in the presence of iodine has been investigated. The process efficiently controls the number‐average molecular weight and low polydispersities ( M w / M n ≤ 1.52). Poly(vinyl acetate) with predetermined molecular weight and relatively low polydispersity was successfully synthesized. The polymerization was followed by online 1 H‐NMR spectra to investigate the evolution of several compounds in the reaction medium, especially the adduct of α‐iodoisobutyronitrile ((CH 3 ) 2 (CN)CI) between primary radicals and iodine. The structure of the end groups of poly(vinyl acetate) also was investigated using 1 H‐NMR spectra. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012