Situdies on Sulfonated Polyurethane Anionomers ( I ) ——The Effect of Different lonization Levels on their Properties

Abstract

Abstract: The sulfonated polyurethane anionomers were synthesized by the ionization of polyurethane, which was prepared by using polytetramethylene oxide (PTMO) as the soft segment and 4,4'-diphenylmethane diisocyanate (MDI) and 1,4-butanediol(BD) as the hard segment, with sodium hydride and r-propane sultone. Their properties were investigated by using IR, differential scanning calorimetry, dynamic mechanical analysis and stress-strain testing. The results indicate that the compatibility of soft segment and hard segment varies with the degrees of ionization. Introducing a small amount of ionic group results in an increase of compatibility of soft and hard segments, but further ionization can increase the degree of phase separation. The mechanical strength and hydrophilicity are gradually increased with the increase of ion content. A new approach for controlling the hydrophilicity of polyurethane and preparing water soluble polyurethane was developed.

Key words: Polyurethane, Anionomer, Sulfonated polyurethane

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Zhai Honglian, Yu Xuehai, Yang Changzheng . Situdies on Sulfonated Polyurethane Anionomers ( I ) ——The Effect of Different lonization Levels on their Properties[J]. Chem. J. Chinese Universities, 1990, 11(7): 743.

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Situdies on Sulfonated Polyurethane Anionomers ( I ) ——The Effect of Different lonization Levels on their Properties

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