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Thermal and mechanical properties of photocured organic–inorganic hybrid nanocomposites of terpene-based acrylate resin and methacrylate-substituted polysilsesquioxane

Authors

  • Shingo Ando,

    1. Department of Life and Environmental Sciences, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
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  • Yoshihiro Someya,

    1. Department of Life and Environmental Sciences, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
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  • Tsutomu Takahashi,

    1. Department of Life and Environmental Sciences, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
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  • Mitsuhiro Shibata

    Corresponding author
    1. Department of Life and Environmental Sciences, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
    • Department of Life and Environmental Sciences, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
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Abstract

Diacrylate compounds derived from α-pinene and limonene (TDAs: TDA-1 and TDA-2) were photocured with methacryl-substituted polysilsesquioxane (ME-PSQ) prepared from 3-(trimethoxysilyl)propyl methacrylate and tetramethylammonium hydroxide (TMAOH) in the TDA/ME-PSQ weight ratio of 20 : 0, 20 : 1, 20 : 2, 20 : 3, and 20 : 4. All the photocured TDA/ME-PSQ hybrid nanocomposites became transparent. The thermomechanical analysis of the cured TDA/ME-PSQ revealed that the glass transition temperature (Tg) increased, the thermal expansion coefficient above Tg decreased with increasing ME-PSQ content, and that the TDA-1/ME-PSQ had ca. 30°C greater Tg than the TDA-2/ME-PSQ with the same ME-PSQ content. Also, the dynamic mechanical analysis revealed that the TDA-1/ME-PSQ had much greater storage modulus at around 150°C than the corresponding TDA-2/ME-PSQ. The flexural strength and modulus of the TDA/ME-PSQ nanocomposites at 20°C had maximum at ME-PSQ content 4.8 and 13.0 wt %, respectively. As a whole, the thermal and mechanical properties of the nanocomposites were improved by the addition of ME-PSQ, and those of TDA-1/ME-PSQ nanocomposites were superior to those of TDA-2/ME-PSQ. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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