Synthesis and properties of highly hydrophilic polyurethane based on diisocyanate with ether group

POLYMER

卷:50

Article

Kojio, Ken¹  Mitsui, Yoshitaka¹  Furukawa, Mutsuhisa² 

[1] Nagasaki Univ, Fac Engn, Dept Mat Sci & Engn, Nagasaki 8528521, Japan

[2] Nagasaki Univ, Grad Sch Sci & Technol, Dept Mat Sci, Nagasaki 8528521, Japan

关键词: Polyurethane;    Hydrophilic;    Microphase separation;   

DOI  :  10.1016/j.polymer.2009.05.030

来源: Elsevier

【 摘 要 】

Highly hydrophilic polyurethane elastomers (PUEs) were synthesized from 1,2-bis(isocyanate) ethoxyethane (TEGDI), poly(ethylene oxide-co-propylene oxide) copolyol (EOPO) and 1,4-butane diol/1,1,1-tri-methylol propane (75/25) (wt/wt) by a prepolymer method. 4,4'-Diphenylmethane diisocyanate (MDI)-based PUEs were synthesized as a control as well. Fourier transform infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC) measurements revealed that the degree of microphase separation of the TEGDI-based PUEs was much weaker than for the MDI-based PUEs. Young's modulus and elongation at break of the TEGDI-based PUEs were quite lower and larger than for the MDI-based PUEs, respectively. This is due to quite weak cohesion force of the hard segment chains in the TEGDI-based PUEs. The degree of swelling of the TEGDI-based PUEs was five times larger than for the MDI-based one. This is associated with the hydrophilic nature of TEGDI and weak cohesion force in the TEGDI-based PUEs. (C) 2009 Elsevier Ltd. All rights reserved.

【 授权许可】

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