期刊
PROGRESS IN ORGANIC COATINGS
卷 77, 期 4, 页码 798-802出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2014.01.006
关键词
Polyurethane-siloxane thermoset copolymers; Phase separation; Contact angle; Hydrophobicity
资金
- Basque Government
- University of the Basque Country [UFI 11/56]
- Ministeno de Ciencia e Innovacion [MAT2010-16171]
Polyurethane-siloxane thermoset copolymers were obtained from Isophorone diisocyanate trimer, Polycaprolactone triol and 10% of hydroxy terminated Polydimethyl siloxane. The copolymers showed a phase separated structure that depended on the conversion of the reaction and casting temperature. The different samples obtained had water contact angles higher than 90 degrees. Moreover the contact angle values presented a maximum at intermediate reaction conversion. Although FTIR measurements showed that siloxane concentration at the surface increased with reaction time, the maximum contact angle value was related to the higher roughness calculated from AFM images. DMTA results confirmed that the phase separation was higher at intermediate conversions. (C) 2014 Elsevier B.V. All rights reserved.
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