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In‐line dielectric monitoring of monomer conversion in a batch polymerization reactor
Author(s) -
Crowley Timothy J.,
Choi Kyu Yong
Publication year - 1995
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.1995.070550909
Subject(s) - polymerization , monomer , materials science , suspension polymerization , dielectric , bulk polymerization , gravimetric analysis , polymer chemistry , induction period , radical polymerization , methyl methacrylate , solution polymerization , chemical engineering , chemistry , organic chemistry , polymer , composite material , optoelectronics , catalysis , engineering
In‐line monitoring of monomer conversion is studied using a low‐frequency dielectric sensor during solution polymerization of methyl methacrylate in a laboratory‐scale batch reactor. It has been found that the induction period due to the presence of an inhibitor can be determined by the dielectric sensor to detect the starting point of polymerization. The dielectric loss factor that changes with the progress of polymerization is empirically correlated with monomer conversion measured by the off‐line gravimetric method at different temperatures and initiator concentrations. It is demonstrated that dielectrometry can be used as an in‐line monitoring method in free‐radical polymerization. © 1995 John Wiley & Sons, Inc.
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