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Urethane/Siloxane Copolymers with Hydrophobic Properties

Authors

  • A. Santiago,

    1. Department of Polymer Science and Technology and Institute for Polymer Materials (POLYMAT), University of the Basque Country. P.O.Box 1072, 20080 San Sebastián, Spain
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  • A. González,

    1. Department of Polymer Science and Technology and Institute for Polymer Materials (POLYMAT), University of the Basque Country. P.O.Box 1072, 20080 San Sebastián, Spain
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  • J. J. Iruin,

    1. Department of Polymer Science and Technology and Institute for Polymer Materials (POLYMAT), University of the Basque Country. P.O.Box 1072, 20080 San Sebastián, Spain
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  • M. J. Fernández-Berridi,

    1. Department of Polymer Science and Technology and Institute for Polymer Materials (POLYMAT), University of the Basque Country. P.O.Box 1072, 20080 San Sebastián, Spain
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  • M. E. Muñoz,

    1. Department of Polymer Science and Technology and Institute for Polymer Materials (POLYMAT), University of the Basque Country. P.O.Box 1072, 20080 San Sebastián, Spain
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  • L. Irusta

    Corresponding author
    1. Department of Polymer Science and Technology and Institute for Polymer Materials (POLYMAT), University of the Basque Country. P.O.Box 1072, 20080 San Sebastián, Spain
    • Department of Polymer Science and Technology and Institute for Polymer Materials (POLYMAT), University of the Basque Country. P.O.Box 1072, 20080 San Sebastián, Spain.
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Abstract

Summary: Different composition polyurethane-siloxane thermoset copolymers obtained from isophorone diisocyanate trimer, poly (caprolactone) triol and hydroxy terminated poly(dimethyl siloxane) were casted over aluminium surfaces. Dynamic mechanical thermal analysis (DMTA) measurements showed that the copolymers presented a phase separated morphology. The water contact angle increased with the siloxane percentage. In addition, for a fixed siloxane percentage, the water contact angle obtained in the air contact generated surface was higher than the one registered in the aluminium contact generated surface, suggesting that the low surface energy siloxane component migrated to the air contact generated surface.

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