磺酸甜菜碱共聚物水溶液的黏度性质

Solution Viscosity of Sulfobetaine-Anionic Copolymers

通过自由基聚合制备了N,N-二甲基-N-甲基丙烯酰氧乙基-N-丁基磺酸铵(DMABS)及其与丙烯酸钠(NaAAc)、对乙烯基苯磺酸钠(NaSS)的均/共聚物。探讨了共聚物溶液的黏度行为随单体组成、聚合物浓度、离子强度与离子种类的变化关系,发现少量阴离子单体的引入可显著提高共聚物在水溶液中的比浓黏度;对于阴离子单体含量较低的共聚物,共聚物水溶液的特性黏数随着离子强度的增加而逐渐上升;而对于阴离子单体含量较高的共聚物,特性黏数随着离子强度的增加而迅速下降。

The copolyrners were prepared via the radical copolymerization of N, N-dimethyl-N-（methacryloyloxy） ethyl ammonium butane sulfonate （DMABS） with sodium acrylate （NaAAc） and sodium styrenic sulfonate （NaSS）, respectively. The dependence of the dilute aqueous solution of the copolymers on the monomer composition, polymer concentration, ion strength and species was investigated in detailed. The results show that the addition of even a very low amount of anionic monomers will significantly enhance the reduced viscosity of the copolymer solutions; for the copolymers with a low comonomer content, the intrinsic viscosity of their aqueous solutions slowly increases with the ionic strength; however, for those with a high comonomer content, it sharply decreases with the addition of NaCl.