Synthesis and Performance of Small Water-Reducing Agent with Carboxyic End Group
Abstract: Esterification from methoxy polyethylene glycol(MPEG) and o-phthalic anhydride were used to small water-reducing agent.The reaction coditions of esterification were studied in this article. The effects of time, temperature, molecular weight of MPEG and feed ratio on the esterificat rate of methoxy polyethylene glycol and o-phthalic anhydride were investigated in detail, and then the optimum reaction condition was determine . The struture of products was characterizated by IR, and orthogonal analysis the result of esterification, Calculate activation energy , meanwhile the application of esterificate products as small water-reducing agent was explored.
