PU大分子单体水溶液性质  

Property of Water-solube PU Macromonomer

作　　者：方治齐[1] 董其宝[1] 刘春华[1] 李志明[1] 

机构地区：[1]合肥工业大学化工学院,合肥230009

出　　处：《应用化学》2003年第8期814-816,共3页Chinese Journal of Applied Chemistry

摘　　要：A water soluble PU macromonomer was synthesized starting from polyethylene glycol oxide, 2,4 toluene diisocyanate, using hydroxyethyl acrylate as end chain termination agent. It is revealed that the intrinsic viscosity of the aqueous solution and cloud point of the macromonomer became lower, and the association of the macromonomer became apparent as hydrophobic mass fraction in the macromonomer composition increased. It is also found that the aggregation state of PU macromonomer in aqueous solution is strikingly dependent on temperature and concentration. Hydrophobic association occurred between macromonomers themselves as the concentration of aqueous solution increased. At higher temperature the HLB value of the macromonomer became lower, and micelle formed at the temperature over 75 ℃ .A water soluble PU macromonomer was synthesized starting from polyethylene glycol oxide, 2,4 toluene diisocyanate, using hydroxyethyl acrylate as end chain termination agent. It is revealed that the intrinsic viscosity of the aqueous solution and cloud point of the macromonomer became lower, and the association of the macromonomer became apparent as hydrophobic mass fraction in the macromonomer composition increased. It is also found that the aggregation state of PU macromonomer in aqueous solution is strikingly dependent on temperature and concentration. Hydrophobic association occurred between macromonomers themselves as the concentration of aqueous solution increased. At higher temperature the HLB value of the macromonomer became lower, and micelle formed at the temperature over 75 ℃ .

关 键 词：大分子单体 聚合物水溶液 聚氨酯 

分 类 号：O631[理学—高分子化学]