Yield: 94.2%; conditions (Scheme 2) forming white flaky precipitates when their solutions were poured into methanol. The conversion of the copolymers was kept between 10 and 20% to minimize compositional drift (Table ). The composition of the copolymers was determined based on the nitrogen content. The copolymers prepared in the present work are all soluble in ethyl acetate, THF, DMF and CHCl3 and insoluble in methanol, ethyl ether, and petroleum ether. Thermal behavior was studied by DSC and TGA. All the copolymers were amorphous and show no crystalline DSC endotherm on repeated heating and cooling cycles. Table shows glass transition values for the ST-ICPA copolymers prepared in this work with no correlation to the size and position of the ICPA ring substitution apparently due to non-uniform composition, monomer unit distribution, and/or molecular weight and MWD. A single Tg was observed for all the copolymers with values 127-147ºC. Information on thermal stability of the copolymers was obtained from TGA (Table ). Decomposition of the copolymers in nitrogen occurred in two steps, first in the 248-500ºC range with residue (1.5-6.1% wt), which then decomposed in the 500-800ºC range. The decomposition products were not analyzed in this study, and the mechanism has yet to be investigated.