阳离子单体TEAA和DEBAA的制备及与AM的共聚

通过在N^ 原子上引入较大的烷基制备两种阳离子单体丙烯酰氧乙基三乙基溴化铵（TEAA）和丙烯酰氧乙基二乙基丁基化铵（DEBAA），并分别同丙烯酰胺（AM）共聚合成了两种阳离子共聚物TEAA-co-AM和DEBAA－co－AM，测定了各自的竞聚率。以硝酸银滴定测定了阳离子度。研究了共聚物水溶液的流动性质，这两类共聚物在水溶液中的比浓粘度都随盐浓度增大而增高，这是由于在盐溶液中盐度增大介质极性增强，至使大分子中较大烷基逃逸水相关发生自缔合的倾向更强烈的原因。

Preparation of Cationic Monomers TEAA and DEBAA and Their Copolymerization with AM

Two type of cationic monomer triethyl acryloyloxyethylammonium bromide(TEAA) and diethyl butyl acryloyloxy ethyl ammonium bromide(DEBAA) are prepared by their bonded bigger alkyl group at N atom .Their copolymers with acrylamide TEAA-co-AM and DEBAA -co-AM are synthesized respectively. The monomer reactivity ratios are measured. The cationic degree(CD) is determined by AgNO 3 solution titration .THe flowing property of copolymer solution is investigated.The reduced viscosity of TEAA-co-AM and DEBAA-co-AM in aqueous solution increases with increasing of the concentration of salts ,because the medium polarity in salt solution is stronger,so the tendency of escaping from the water phase and self associating of bigger alkyl groups in macromolecules changes powerful.