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Online monitoring of reaction temperature during cationic ring opening polymerization of epichlorohydrin in presence of BF 3 and 1,4‐butanediol
Author(s) -
Su Kim Jeong,
Ohk Kweon Jeong,
Tae Noh Si
Publication year - 2014
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.39912
Subject(s) - epichlorohydrin , cationic polymerization , induction period , dispersity , polymerization , polymer chemistry , monomer , exothermic reaction , ring opening polymerization , molar mass distribution , oligomer , materials science , bulk polymerization , chemistry , radical polymerization , organic chemistry , polymer , catalysis
This work introduces cationic ring opening polymerization of polyepichlorohydrin (PECH) produced under various reaction conditions (set temperature: −10 to 40°C, [C]/[I] ratio: 0.1–1, monomer feed rate: 1–4 mL/min). In addition, a correlation between the exothermic reaction temperature and the performance of the PECH was obtained by utilizing a reaction temperature monitoring system, GPC, 1 H‐NMR, and FTIR. During the polymerization, an induction period which affects the polydispersity was observed below 10°C. At lower temperatures and lower [C]/[I] ratios, a higher induction period was observed. The monomer feed rate did not affect the induction period but it highly affected the polydispersity when the induction period occurred. The total molecular weight of PECH increased with decreasing set temperature even though the amount of low molecular weight cyclic oligomer increased. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 39912.