摘要
以Span-85和Span-60作为复合乳化剂,采用反相乳液聚合法合成了高分子量聚丙烯酸钠。研究了复合乳化剂的配比对聚合体系稳定性的影响以及中和度、过硫酸盐-亚硫酸氢钠引发剂和不同溶剂对聚合物性能的影响。结果表明,最佳的实验条件为:中和度95%,乳化剂用量10%(油相),其中Span-60占乳化剂用量的95%,引发剂用量(以单体质量分数计)分别为K2S2O80.06%,NaHSO30.02%,选用环己烷作溶剂。在最佳实验条件下,合成聚合物相对分子质量达1.24×107,且水溶性能优于其他聚合条件下所得产品。
Sodium polyacrylate of high molecular weight was synthesized by inverse emulsion polymerization with Span - 60 and Span - 85 as emulsifying agents. The effect of proportion of emulsifiers on the stability of the polymerization was investigated, the effects of initiator dosage, neutralization degree and different solvents on the performance of the products were also investigated. The results showed that the optimal experimental conditions were as follows： neutralization degree 95 %, mass percentage of emulsifier 10 % （based on total mass of oil phase）, the mass percentage of Span-60 95% （based on the total mass of emulsifiers）, mass percentage of initiatiors K2S2O8 0.06%, NaHSO3 0.02 % （ based on total mass of monomer）, cyclohexane used as solvent. Under these conditions, the molecular weight of the synthesized product was up to 1.24×10^7, the solubility of the product was better than that synthesized by other conventional solution polymerization.
出处
《精细石油化工进展》
CAS
2008年第1期45-48,共4页
Advances in Fine Petrochemicals
基金
江苏省南通市科技基金项目(NoK2006007和NoK2006012)
关键词
聚丙烯酸钠
反相乳液聚合
絮凝剂
特性粘度
相对分子质量
溶解性
sodium polyacrylate, inverse emulsion polymerization, flocculant, intrinsic viscosity, molecular weight, solubility
