Hybrid thermosets from polyisocyanate/water glass/emulsifier systems: Effects of melamine-formaldehyde resin

Authors

  • Núria Castellà,

    1. Institut für Verbundwerkstoffe GmbH (Institute for Composite Materials), Kaiserslautern University of Technology, D-67663 Kaiserslautern, Germany
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  • Sergiy Grishchuk,

    Corresponding author
    1. Institut für Verbundwerkstoffe GmbH (Institute for Composite Materials), Kaiserslautern University of Technology, D-67663 Kaiserslautern, Germany
    • Institut für Verbundwerkstoffe GmbH (Institute for Composite Materials), Kaiserslautern University of Technology, D-67663 Kaiserslautern, Germany
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  • Jozsef Karger-Kocsis,

    1. Faculty of Mechanical Engineering, Department of Polymer Engineering, Budapest, University of Technology and Economics, H-1111 Budapest, Hungary
    2. Polymer Technology, Faculty of Engineering and Built Environment, Tshwane University of Technology, Pretoria 0001, South Africa
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  • Martin Schehl

    1. Institut für Verbundwerkstoffe GmbH (Institute for Composite Materials), Kaiserslautern University of Technology, D-67663 Kaiserslautern, Germany
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Abstract

Melamine-formaldehyde resin (MF) was selected as potential reactive emulsifier for polyurea-based thermoset resins produced from polyisocyanate/water glass (WG)/emulsifier systems. As emulsifier tricresylphosphate and/or MF served for the initial water-in-oil type (“water” = WG; “oil” = polyisocyanate + emulsifier) emulsions. The MF content of the systems has been varied (≤15 wt %) and its effect on the structure, mechanical, thermal and flammability properties of the final polyurea-based thermosets studied. It was found that MF is a suitable emulsifier, which can fully replace the phosphate without negatively affecting the properties of the resulting hybrid thermosets. Moreover, hybridization with MF was often accompanied with pronounced improvements in fracture mechanical and static flexural properties. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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