聚丙烯酸与P(DMAEMA-co-NIPAM)共聚物的相互作用-陕西师范大学学报期刊社网站

陕西师范大学学报（自然科学版）

化学与材料科学

聚丙烯酸与P(DMAEMA-co-NIPAM)共聚物的相互作用

张朝阳，刘守信*，陈奋强，姜宇，房喻

(应用表面与胶体化学教育部重点实验室；陕西师范大学化学与材料科学学院，陕西西安 710062)

张朝阳，女，硕士研究生，主要从事刺激响应性高分子与软物质研究.

摘要:

以甲基丙烯酸-N, N-二甲氨基乙酯和N-异丙基丙烯酰胺为功能单体，采用自由基聚合法合成一系列不同组成的聚（甲基丙烯酸-N, N-二甲氨基乙酯-co-N-异丙基丙烯酰胺）P(DMAEMA-co-NIPAM)共聚物．利用紫外透光率和荧光技术研究了聚合物水溶液的相行为以及聚丙烯酸(PAA)对P(DMAEMA-co-NIPAM)共聚物pH敏感性的影响．结果表明，所合成的P(DMAEMA-co-NIPAM)共聚物其温敏性和pH敏感性相互依赖．在pH值等于4附近时，PAA的加入对P(DMAEMA-co-NIPAM)的pH敏感性产生较大影响．

关键词：

甲基丙烯酸-N，N-二甲氨基乙酯； N-异丙基丙烯酰胺；无规共聚物；自由基聚合

收稿日期：

2007-08-18

中图分类号：

O 631

文献标识码：

文章编号：

1672-4291(2008)03-0060-05

基金项目：

国家自然科学基金资助项目(20674048)

Doi:

Interaction between polyacrylic acid and poly(2-dimethylaminoethyl methacrylate-co-N-isopropylacrylamide)

ZHANG Zhao-yang, LIU Shou-xin*, CHEN Fen-qiang, JIANG Yu, FANG Yu

(Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; College of Chemistry and Materials Science, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)

Abstract:

The random copolymers P(DMAEMA-co-NIPAM) with different feed ratio (by molar percent) were prepared by free radical polymerization. The phase behavior of the random copolymers in aqueous solutions and its pH sensitivity effected by poly (acrylic acid) (PAA) were studied by UV-Vis transmittance measurement and fluorescence techniques. The results demonstrated that the temperature and pH-sensitivities for the random copolymers in aqueous solutions were mutually influenced.The addition of PAA greatly influenced the pH sensitivity of P(DMAEMA-co-NIPAM) at about pH 4.

KeyWords:

N, N-dimethylaminoethyl methacrylate; N-isopropylacrylamide; random copolymer; free radical polymerization