四元两性疏水缔合聚合物的聚合流变动力学与聚合物溶液流变性研究

Rheokinetics and Rheological Properties of an Amphoteric Hydrophobic Quadripolymer Solutions

彭飞 方波 卢拥军 侯向前 邱晓慧 黄彩贺 刘玉婷 翟文

PENG Fei FANG Bo LU Yongjun HOU Xiangqian QIU Xiaohui HUANG Caihe LIU Yuting ZHAIWen

采用自由基溶液聚合法，以丙烯酰胺（AM）、2-甲基-2-丙烯酰胺基丙磺酸（AMPS）、N，N-二甲基丙烯酰胺（DMAM）、十六烷基二甲基烯丙基氯化铵（CDAAC）为原料合成了四元两性疏水缔合聚合物（（Poly（AM/AMPS/DMAM/CDAAC）简称PAADC），考察了聚合反应过程中体系弹性模量和黏性模量随时间的变化关系，首次建立了流变动力学方程来描述聚合反应过程中弹性模量变化。对PAADC和三元水溶性聚合物（Poly（AM/AMPS/DMAM），PAAD）溶液流变性研究表明，PAADC的临界缔合质量浓度约为2.5 g/L；在温度30℃、剪切速率70 s-1下，浓度6 g/L 的PAADC溶液黏度是相同浓度PAAD溶液黏度的3 倍多。与PAAD相比，PAADC具有更好的耐温、耐剪切性、显著的黏弹性和触变性；共转Jeffreys 模型可表征两种聚合物溶液的剪切流动曲线。图8 表2 参19

An amphoteric hydrophobic quadripolymer（PAADC）was synthesized by free radical solution polymerization using acrylamide（AM），2-Acrylamide-2-methylpro panesulfonic acid（AMPS），N，N-dimethyl acrylamide（DMAM）and cetyl dimethyl allyl ammonium chloride（CDAAC）as monomers. The elastic and viscous moduli vary with reaction time in the polymerization process was investigated. The rheokinetics equation was established for the first time to well describe the changes of elastic modulus in the process of polymerization. The results of rheological studies showed that，the critical association concentration of PAADC was about 2.5 g/L，and at the same concentration of 6 g/L the viscosity of PAADC solution was 3 times more than that of PAAD solution at the temperature of 30℃ and at the sheer rate of 170 s-1. PAADC solution possessed better characteristics of heat resistance，shear resistance，much more significant viscoelasticity and thixotropy compared with that of PAAD solution. The flow curves of these two polymer solutions could be described by co-rotational Jeffreys model.

10.19346/j.cnki.1000-4092.2016.06.017