无机盐对两性聚丙烯酰胺特性粘度的影响

Study on the intrinsic viscosity changing with salts of AM-MADQUAT-NaAMPS copolymer

用红外吸收光谱对两性聚丙烯酰胺结构进行了表征,表明分子链上丙烯酰胺(AM)、甲基丙烯酰氧乙基三甲基氯化铵(MADQUAT)和丙烯酰胺基甲基丙磺酸钠(NaAMPS)链节的存在。随后研究了NaCl、CaCl2浓度及pH值对不同阴阳离子度的聚合物特性粘度的影响。结果表明,AM-MADQUAT-NaAMPS共聚物特性粘度受CaCl2浓度影响较NaCl大,但总的来说耐盐性比单性离子聚合物好,且其特性粘度在很大范围内(除等电点附近)不受pH值的影响。

Infrared absorption spectrometry has been performed on the structure of amphoterie polyaerylamide. It was found that sodium-2-methylpropanesulfonate （ NaAMPS ）, 2-（ methaeryloyloxy ）-ethyltrimethlammonium ehloride（ MADQUAT）, and aerylamide（AM） existed on the ehains of amphoterie polyaerylamide. The studies on the intrinsie viseosity ehanging with the eoneentration of NaCl and CaCl2 indieated the amphoterie polyaerylamide showing high salt-toleranee, and the intrinsie viscosity ehanging with CaCl2 was more obvious. The studies on the intrinsie viseosity ehanging with pH found that it was influeneed hardly far from IEP.