Thermal and surface properties of hybrid materials obtained from epoxy-functional urethane and siloxane

• Published in: Polymer bulletin (Berlin, Germany) Vol. 73; no. 5; pp. 1247 - 1265
• Main Authors: Byczyński, Łukasz, Dutkiewicz, Michał, Maciejewski, Hieronim
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2016; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Complex Fluids and Microfluidics; Contact angle; Diethylene triamine; Fourier transforms; Free surfaces; Organic Chemistry; Original Paper; Physical Chemistry; Polymer Sciences; Polymers; Siloxanes; Soft and Granular Matter; Spectrum analysis; Surface energy; Surface properties; Thermal degradation; Thermal stability; VOCs; Volatile organic compounds; Germany; Crosslinking; Free surface energy; Polyurethane; Siloxane; High solids; Thermal degradation
• ISSN: 0170-0839; 1436-2449
• DOI: 10.1007/s00289-015-1545-7

In this work, a series of high-solids crosslinked hybrid networks based on the epoxy-terminated urethane oligomer and the comb-like structure epoxy-functional siloxane cured with diethylenetriamine, were obtained. The structure of the obtained poly(urethane–siloxane) thermosets was confirmed by FTIR spectroscopy. The samples were submitted to detailed thermal degradation investigations at non-isothermal conditions in nitrogen and air. The contact angles of the coatings and free surface energy calculated by Owens–Wend as well as van Oss–Good method, were studied. Some coating properties of the obtained hybrid materials were also investigated. The synthesized poly(urethane–siloxane) networks are hydrophobic materials, with free surface energy of 26–29 mJ/m 2 . The thermal stability and hardness of these increases with increasing siloxane content.