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Glass Transition Temperatures of Poly[(methyl methacrylate)‐ co ‐(butyl acrylate)]s Synthesized by Atom‐Transfer Radical Polymerization
Author(s) -
FernándezGarcía Marta,
de la Fuente Jos� L.,
FernándezSanz Marina,
Madruga Enrique L.
Publication year - 2001
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/1521-3927(20010901)22:13<1046::aid-marc1046>3.0.co;2-q
Subject(s) - atom transfer radical polymerization , polymer chemistry , copolymer , butyl acrylate , glass transition , differential scanning calorimetry , methyl methacrylate , materials science , catalytic chain transfer , acrylate , polymerization , radical polymerization , methyl acrylate , acrylate polymer , solution polymerization , polymer , thermodynamics , composite material , physics
Glass transition temperatures T g of methyl methacrylate/butyl acrylate copolymers obtained by means of atom‐transfer radical polymerization are measured using differential scanning calorimetry. Due the nature of this polymerization method an increase in molecular weight is produced as the reaction progresses, which gives rise to an increase in T g . Simultaneously, a composition gradient with the enrichment of butyl acrylate causes a decrease in T g . These opposite effects almost compensate each other and, therefore, no influence on the molecular weight at M̄ n < 10000 is found. This fact allows the application of the Johnston's equation and the Mayo‐Lewis terminal model to describe and predict the variation in T g with copolymer conversion for the copolymers and under the experimental conditions investigated.