东华大学学报（英文版）2004，Vol.21Issue(5)：60-64,5.
Synthesis and Characterization of EO/PO Random Copolyethers
Synthesis and Characterization of EO/PO Random Copolyethers
GUO Jian-guo 1YUAN Ren-xu 2HE Su-qin 2ZHU Cheng-shen 2JIAO Yu 2JIANG Jian-ming2
作者信息
- 1. College of Materials Engineering, Donghua University, Shanghai 200051, China
- 2. College of Materials Engineering, Zhengzhou University, Zhengzhou 450052, China
- 折叠
摘要
Abstract
Ethylene oxide(EO) and propylene oxide(PO) random copolyethers were synthesized by the sequential addition of the mixture of ethylene oxide and propylene oxide to propylene glycol (initiator) in the presence of potassium hydroxide(KOH), and characterized with infrared spectrum(FTIR) and nuclear magnetism resonance(NMR). The effects of catalyst concentration, reaction temperature, charging rate and EO/PO mixture ratio on the polymerization reaction were investigated. It was revealed that the optimal reaction condition is the ratio of 2.5:1000(KOH mass vs. product mass), at 114.6℃ and pressure below 0.4MPa. The residual KOH was neutralized by phosphoric acid(H3PO4). Then the crude copolyether was refined with adsorbents, and the refined copolyether, which contains less than 0.7μg/ml K+, was obtained as colorless, viscous liquid.关键词
ethylene oxide/propylene oxide/polyether/propylene glycolKey words
ethylene oxide/propylene oxide/polyether/propylene glycol引用本文复制引用
GUO Jian-guo,YUAN Ren-xu,HE Su-qin,ZHU Cheng-shen,JIAO Yu,JIANG Jian-ming..Synthesis and Characterization of EO/PO Random Copolyethers[J].东华大学学报（英文版）,2004,21(5):60-64,5.
