Photocrosslinked polymers based on pendant extended chalcone as photoreactive moieties

The photoreactivity of new homo- and co-photosensitive polymers containing pendant chalcone moieties attached through hexamethylene spacer lengths bet ween the photosensitive group and the backbone were studied. The rates of c rosslinking of the prepared polymers were investigated under different cond itions in solutions such as: backbone structures, copolymerization, differe nt solvents, different concentrations and different temperatures. The struc tures of the prepared monomer and polymers were confirmed by different spec troscopic methods and elemental microanalysis. The average molecular weight s of the polymers were determined by gel permeation chromatography. The the rmal stability of the polymers was measured by thermogravimetric analysis u nder a nitrogen atmosphere. (C) 1999 Elsevier Science Ltd. All rights reser ved.