Abstract
New copolymers were prepared from methacrylate and methacrylamide derivatives of cholic acid and methacrylic acid by free radical polymerization in solution. The copolymers were characterized by solid-state 13C NMR spectroscopy and differential scanning calorimetry. The copolymers all have a single glass transition temperature located between the glass transition temperature of the two corresponding homopolymers. The copolymers were found to be random, and the chemical composition in the final products was close to the original monomer composition in the feed prior to polymerization. Water absorption measurements showed that the water absorption capacity of the copolymers increases from about 10% to about 35% with increasing molar ratio of methacrylic acid in the copolymers.
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