Studies on Phase Structure of Polyurethanes Prepared from Poly(1,3-dioxepane) Diols --Effect of Chemical Structure of Soft Segment on Phase Structure of Polyurethanes

Abstract

Abstract: Polyurethanes were prepared using poly(1,3-dioxepane)diols(polyDOP) and poly(tetrahydrofuran)diols(polyTHF) as soft segment. The phase structures of these polyurethanes were analyzed by means of FTIR and DSC methods. The introduction of oxymethyl groups into the main chain of poly(THF) resulted in lower crystallization abilities of soft segment phase and heterogeneity of order region in hard segment phase. The effects of the chemical structure of soft segment on the crystallization of soft segment phase and order region in hard segment phase were discussed.

Key words: Poly, (1,3-dioxepane) diols, Polyurethanes, Phase structure

CLC Number:

O631

TrendMD:

LIU Ye, YANG Bo, ZHOU Xian-Zhi, PAN Cai-Yuan . Studies on Phase Structure of Polyurethanes Prepared from Poly(1,3-dioxepane) Diols --Effect of Chemical Structure of Soft Segment on Phase Structure of Polyurethanes[J]. Chem. J. Chinese Universities, 1999, 20(3): 470.

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Studies on Phase Structure of Polyurethanes Prepared from Poly(1,3-dioxepane) Diols --Effect of Chemical Structure of Soft Segment on Phase Structure of Polyurethanes

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