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Bulk and emulsion copolymerizations of n ‐butyl acrylate and poly(methyl methacrylate) macromonomer
Author(s) -
Rajatapiti P.,
Dimonie V. L.,
ElAasser M. S.
Publication year - 1996
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/(sici)1097-4628(19960808)61:6<891::aid-app2>3.0.co;2-c
Subject(s) - macromonomer , methyl methacrylate , materials science , polymer chemistry , copolymer , butyl acrylate , miniemulsion , acrylate , methacrylate , monomer , polymer , composite material
Bulk and emulsion copolymerizations of an ω‐unsaturated poly(methyl methacrylate) (PMMA) macromonomer with n ‐butyl acrylate ( n ‐BA) were investigated. The reactivity of PMMA macromonomer in bulk copolymerization with n ‐BA was found to be lower than that of methyl methacrylate monomer with n ‐BA. The incorporation of PMMA macromonomer into poly(butyl acrylate) (PBA) latex particles by miniemulsion copolymerization was proved by high performance liquid chromatography‐silica adsorption spectroscopy. Dynamic mechanical studies showed that PMMA macromonomer was grafted to the PBA backbone, and the degree of grafting increased as the ratio of PMMA macromonomer to n ‐BA increased. Microphase separation of the PMMA macromonomer grafts was observed at higher ratio of macromonomer (higher or equal to 10% weight of macromonomer based on total polymer phase). The n ‐BA/PMMA macromonomer copolymer behaved completely differently from the physical blend of PBA and PMMA macromonomer particles of the same composition. © 1996 John Wiley & Sons, Inc.