自乳化微乳液法两亲水溶性聚合物的制备及性能

Preparation and Properties of Amphiphilic Water-Soluble Polymers by Self-Emulsification Microemulsion Method

摘要:

通过自乳化微乳液聚合的方法，以丙烯酰胺、丙烯酸、苯乙烯为原料，制备出两亲水溶性聚合物，避免了传统的微乳液聚合中引入过多小分子乳化剂而导致后期处理过程复杂的问题，同时对自乳化微乳液聚合机理进行探讨。红外和核磁结果表明：丙烯酰胺与丙烯酸和苯乙烯发生了共聚反应。DSC结果表明：生成的共聚物为嵌段结构。表面张力测定仪和数值黏度测试结果表明：当单体配比为m（AM）：m（AA）：m（St）=87.5:10:2.5时，其表面活性和黏度可达26.113 mN/m和1260 mPa·s，并解释了不同含量疏水单体存在时，溶液中分子链的聚集状态。

Abstract:

The amphiphilic water-soluble polymer was prepared from acrylamide, acrylic acid and styrene via self-emulsification microemulsion method. It can avoid back treatment of an excess of low-molecular weight emulsifier in comparison with the conventional microemulsion polymerization. In addition, the mechanism of self-emulsified microemulsion polymerization was explored. FTIR, 1HNMR results showed that the copolymerization of acrylamide (AM) with acrylic acid (AA) and styrene (St) was carried out. The DSC result showed that the copolymer had a block structure. The surface tension tester and numerical viscosity test results showed that when the monomer ratio of m(AM):m(AA):m(St) is 87.5:10:2.5, the surface activity and viscosity of the copolymer solution were 26.113 mN/m and 1260 mPa·s, respectively. Furthermore, the aggregation state of molecular chains in the copolymer solution was explained in the presence of different levels of hydrophobic monomers.