Photocrosslinking of Vinyl Acetate-Isopropenyl Acetate Copolymer by Quinones

Abstract

Photocrosslinking of vinyl acetate-isopropenyl acetate (VAc-IPAc) copolymer was studied in the solid state in the presence of various quinones. The photocrosslinking reaction in the presence of p-benzoquinone and naphthoquinone proceeded very easily with irradiation. Photocrosslinking efficiency of partially hydrolyzed copolymer films was lower than that of VAc-IPAc copolymer films. Especially, the photocrosslinking efficiency of copolymer films partially hydrolyzed at random was lower than that of copolymer films partially hydrolyzed in a block way. The acetoxy groups in the copolymers were deduced to play an important role in the photocrosslinking because the crosslinked polymers could be made water soluble on hydrolysis. © 1987, The Society of Polymer Science, Japan. All rights reserved.