화학공학소재연구정보센터
Journal of Polymer Science Part A: Polymer Chemistry, Vol.45, No.20, 4597-4605, 2007
Radical copolymerization of alkyl 2-norbornene-2-carboxylate with alkyl acrylates: Facile incorporation of norbornane framework into poly(alkyl acrylate)s
Radical copolymerization of alkyl 2-norbornene-2-carboxylates (alkyl = Me 1a, nBu 1b) with alkyl acrylates (alkyl = ethyl, methyl, and n-butyl) was investigated. Copolymerization of 1a,b with the alkyl acrylates initiated by 1,1'-azobis (cyclohexane-l-carbonitrile) at 85 degrees C proceeded to give random copolymers, although the homopolymerization of 1a,b did not proceed efficiently under the same conditions. Typically, bulk copolymerization of la with ethyl acrylate in a feed ratio of 1:3 ([1a]:[EA]) afforded a copolymer with Mn = 33,300 containing 19.4 mol % of 1a unit in the composition. An increase of T-g derived from the incorporation of the rigid norbornane framework was observed, although the extent of the temperature rise was rather moderate. The ternary radical copolymerization of 1a,b/alkyl acrylate/N-phenylmaleimide proceeded to give copolymers with the three repeating units in the main chain. (c) 2007 Wiley Periodicals, Inc.