The copolymerizations of N-methyl maleimide (NMM) with three vinyl ethers bearing 2-pyridine carbinol, mono and bipyrazole were investigated. The synthesis by phase transfer catalysis of 2-chloroethyl vinyl ether with the corresponding alcohols were performed in moderate yield. Copolymerization with various feed compositions were carried out in order to check the alternance. Although the initial rate of copolymerization was higher for the stoichiometric compositions used, the copolymers contain in each case more than 70% of NMM. Thus, contrary to expected results, the copolymers were not alternated. T g values of these copolymers are in the 100-160°C range and increase with NMM content. Moreover, the TGA measurement showed the decomposition started from about 250°C, the middle part being at 300°C, and from 500°C a total decomposition occurred.