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Effect of crosslinking density on the physical properties of interpenetrating polymer networks of polyurethane and 2-hydroxyethyl methacrylate-teminated polyurethane

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Abstract

Interpenetrating polymer networks (IPNs) of 2-hydroxyethyl methacrylate-terminated polyurethane (HPU) and polyurethane (PU) with different crosslinking densities of the PU network were prepared by simultaneous solution polymerization. Dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC) show that compatibility of component polymers in IPN formation depends on the crosslinking density of the PU network. Physical properties such as density and water absorption rely on the subtle balance between the degree of phase separation and the crosslinking density of the PU network. In spite of the occurrence of phase separation, the tensile moduli and tensile strength of the IPNs increase with the crosslinking density of the PU network. Morphological observation by scanning electron microscopy revealed different fracture surfaces between the compatible and incompatible IPNs. Surface characteristics of the IPNs, indicated as hydrogen bonding index and hard-to-soft segment ratio, are altered considerably by varying surface morphologies. Improved blood compatibility of IPN membranes is due to the variation of the hydrophilic and hydrophobic domain distribution.

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Authors and Affiliations

  1. Department of Chemical Engineering, Monash University, Clayton, Vic., 3168, Australia

    Tsung-Tang Hsieh & Carlos Tiu

  2. Department of Materials Engineering, Monash University, Clayton, Vic., 3168, Australia

    George P. Simon

  3. Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan, ROC

    Kuo-Huang Hsieh

  4. Laboratory of Particle Technology, National Taiwan University, Taipei, 10617, Taiwan, ROC

    Hsiao-Ping Hsu

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  1. Tsung-Tang Hsieh
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  2. Kuo-Huang Hsieh
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  4. Carlos Tiu
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  5. Hsiao-Ping Hsu
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Correspondence to Tsung-Tang Hsieh.

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Hsieh, TT., Hsieh, KH., Simon, G.P. et al. Effect of crosslinking density on the physical properties of interpenetrating polymer networks of polyurethane and 2-hydroxyethyl methacrylate-teminated polyurethane. J Polym Res 5, 153–162 (1998). https://doi.org/10.1007/s10965-006-0051-x

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  • DOI: https://doi.org/10.1007/s10965-006-0051-x

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