PREPARATION OF POLYTETRAMETHYLENE GLYCOL BY BF3 SYSTEM

Chinese Journal of Applied Chemistry ›› 1991, Vol. 0 ›› Issue (2): 94-96.

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PREPARATION OF POLYTETRAMETHYLENE GLYCOL BY BF₃ SYSTEM

Zhang Afang^1,2, Zhang Hongzhi¹, Yang Huichang^1,2, Feng Xinde¹

Department of Chemistry, Peking university, Beijing 100871

Received:1990-03-16 Revised:1990-11-12 Published:1991-04-10 Online:1991-04-10

Abstract

Abstract: The effects of water on the molecular weight and yield of polytetramethylene glycol(PTMG) prepared from tetrahydrofuran by using BF₃-etherate and epichlorohydrin(ECH)asinitiator system were studied.The high yield of of PTMG with controlled average molecularweight of 1000～2000 can be obtained by delating the time of adding water.The once-through yield was around 60～80% and the ultimate yield reached 90% for PTMG of mole-cular weightaround 2000.The segmented polyurethane with high mechanical propertieswas prepared thereby.

Key words: tetrahydrofuran, polytetramethylene glycol, boron fluoride, ring opening polymerization, cationic polymerization

Zhang Afang, Zhang Hongzhi, Yang Huichang, Feng Xinde. PREPARATION OF POLYTETRAMETHYLENE GLYCOL BY BF₃ SYSTEM[J]. Chinese Journal of Applied Chemistry, 1991, 0(2): 94-96.

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PREPARATION OF POLYTETRAMETHYLENE GLYCOL BY BF₃ SYSTEM

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