Abstract：Triethylamine was used to catalyze the esterification reaction between HPMA and polyethylene glycol monomethyl ether to synthesize carboxylic acid water reduction agent. The effects of acid to alcohol molar ratio,reaction temperature,reaction time and the amount of the catalyst on the esterification reaction were tested, and the effects of the different catalysts were compared. The results show that the optimal reaction conditions mean that the acid to alcohol molar ratio is 15∶ 1,reaction temperature is 85 ℃,reaction time is 6hours,and the amount of catalyst is 2% of the total weight of reactant. Under the same conditions,the catalytic effect of concentrated sulfuric acid is best,the one of triethylamine is similar to the one of p-Toluenesulfonic acid,and the one of sodium hydroxide is relatively poor.

Keyword：triethylamine;HPMA;water reducing agent;polycarboxylic acid;reaction temperature;