一种CO2调控变粘聚合物合成及变粘机理分析

A CO2-triggered viscosity-sensitive copolymer synthesis of N, N-dimethylaminoethyl methacrylate and acrylamide and mechanism evaluation

摘要:

将甲基丙烯二甲胺基乙酯(DMAEMA)与丙烯酰胺( AM)进行水溶液原子自由基共聚，制备出一种新型粘度可控聚合物P (AM-DMAEMA)。其最佳合成条件为: 单体浓度20%，聚合温度40℃，引发剂浓度0.2 %，聚合时间4.0h。聚合物分子结构采用核磁氢谱进行表征; 通过溶液电导率、Zeta电位及粒径分析实验证实其具有CO2可逆调控性能，并对聚合物溶液粘度变化性能及变粘机理进行了研究。结果表明，P(AM-DMAEMA)水溶液具有CO2调控变粘性能和较好的CO2结合稳定性。

Abstract:

A CO2-triggered viscosity-sensitive copolymer P(AM-DMAEMA) was synthesized by N, N-dimethylaminoethyl methacrylate and acrylamide with different monomer ratio. The optimal conditions were that: monomer concentration 20%, initiator concentration 0.2%, polymerization temperature 40℃, polymerization time 4.0h. Molecular structure of polymer was characterized by 1H-NMR.Conductivity, Zeta-potential, effective diameter and viscosity experiments were employed to investigate their CO2-triggered viscosity properties and the mechanism of viscosity variation has been found. The results showed that the copolymer presented diversely viscosity variation properties and good CO2 absorb stability．