SYNTHESIS AND PROPERTIES OF WATER-SOLUBLETHERMOPLASTIC CRYSTALLINE POLYMEROF ETHYLENE OXIDE
水溶性热塑性结晶高聚物聚环氧乙烷的合成及其性能的研究

Ethylene oxide was polymerized in toluene with bimetallic-loxo-alkoxide catalyst or i-Bu3Al-H3PO4H2O-dimethylaniline (DMA)quatermary catalyst, polymerization proceeded homogeneously. Both catalysts show high activity. The molecular weight of the products obtained approaches one million. If petroleum ether was used instead of toluene as polymerization medium, both conversion and molecular weight of the polymer decreased. The optimum molar ratio of i-Bu3Al:H3PO4:H2O:DMA eqaual 1:0.17:0.17:0.10. The product ob-tained with these catalyst dissolves in water and can be molded.The breaking strength increases with increase in molecular weight and can reach 100kg/cm2.