The appropriate choice of catalysts and comonomers improved the selectivity of the gassolid-phase reaction of carbon dioxide into copolymers from glycidyl methacrylate (GMA), which transforms the pendent oxirane moieties to cyclic carbonate moieties. Benzyltributylammonium chloride (BnBu 3-NCl) exhibited good and selective catalytic behavior owing to its appropriate mobility in the copolymer film and moderate catalytic activity. n-Butyl methacrylate proved to be an effective comonomer, resulting in higher incorporation efficiency and better selectivity by preventing the cross-linking reaction, allowing one to obtain soluble polymers bearing cyclic carbonate structure.
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