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Studies of higher temperature polymerization of n ‐butyl methacrylate and n ‐butyl acrylate
Author(s) -
Grady Michael C.,
Simonsick William J.,
Hutchinson Robin A.
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200206)182:1<149::aid-masy149>3.0.co;2-d
Subject(s) - polymer chemistry , butyl acrylate , polymerization , methacrylate , acrylate , monomer , chain transfer , chemistry , radical polymerization , kinetics , solution polymerization , intramolecular force , kinetic chain length , polymer , photochemistry , organic chemistry , physics , quantum mechanics
Free‐radical acrylic polymerizations of n‐butyl methacrylate and n‐butyl acrylate at temperatures above 120°C show significant departure from classic free‐radical kinetics. An extended model of depropagation, where the equilibrium monomer concentration varies with temperature and polymer content, is postulated and shown to adequately explain the data for n‐butyl methacrylate. Intramolecular chain transfer and scission is postulated to explain the apparent reduction in molecular weight and rate of polymerization seen in n‐butyl acrylate polymerization, with supporting experimental evidence found via electrospray‐ionization mass spectrometry.