Abstract: | Dimethylacrylamide (DMA) has been copolymerized with 2-methoxyethylacrylate (MOEA) and solutions of the products were analysed by FTIR to yield derived reactivity ratios rDMA = 1.11 ± 0.13 and rMOEA = 0.63 + 0.10. The measured glass transition temperatures Tg of PDMA and PMOEA were 395 K, and 242 K, respectively. These and the values of Tg for the copolymers accorded well with the Fox relationship. Cloud point curves for copolymers in water were established over a wide range of concentration, solubility decreasing with increase in temperature. For these reversibly thermotropic solutions, the lower critical solution temperature (LCST) increased from 9°C to 80°C with decrease in content of MOEA in the copolymer from 91.1 mol% to 38.6 mol%. |