Polymeric ultraviolet absorbers have been synthesized by free-radical solution copolymerization in cyclohexanone at 70°C of methyl methacrylate and 2-hydroxy-4-acryloyloxybenzophenone at low (below 10%) conversion of monomers. The composition of the copolymers was determined by UV, IR, and NMR. The reactivity ratios were determined and the effect of copolymer composition on viscosity was studied. The copolymers were also studied by TGA and DSC. The latter showed the effect of copolymer composition on the glass-transition temperature.
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Parmar et al. (1986) studied this question.
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