Journal
INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS
Volume 59, Issue 8, Pages 519-530Publisher
TAYLOR & FRANCIS AS
DOI: 10.1080/00914031003760634
Keywords
copolymerization; crosslinking; NMR; photoresists; reactivity ratio; UV irradiation
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Copolymers of 4-cinnamoyl phenyl methacrylate (4-CPMA) and n-butyl methacrylate (BMA) were prepared in a methyl ethyl ketone (MEK) solution with benzoyl peroxide (BPO) as an initiator at 70 degrees C. They were characterized with UV, IR, 1H-NMR, 13C-NMR, TGA, DSC and gel permeation chromatography. Copolymers were prepared by using different feed ratio of monomers. The monomer reactivity ratios determined by the method of Kelen-Tudos (K-T) were r1 (CPMA)=2.32, r2 (BMA)=0.56. The glass transition temperature of the copolymer shows a single Tg indicating the formation of random copolymer for all of the monomer feed composition. Thermogravimetric analysis in air has shown that the initial decomposition temperature of the copolymer was above 220 degrees C. The photocrosslinking properties of the copolymer were examined by UV irradiation with polymer film.
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