Nanocomposites made from thermoplastic linear poly(urethane-siloxane) and organoclay: Composition impact on the properties
نویسندگان
چکیده
Thermoplastic poly(urethane-siloxane)/organoclay nanocomposites (TPU NCs) with different hard segment content (20?55 wt. %) were prepared by in situ polymerization the presence of organically modified montmorillonite as a nanofiller (Cloisite 30B; 1 %). Hydroxyl-terminated ethoxypropyl- poly(dimethylsiloxane) was used soft segment, while 4,4'-methylenediphenyl diisocyanate and 1,4-butanediol components. The study influence on functional properties TPU NCs performed Fourier transform infrared (FTIR) spectroscopy, X-ray diffractometry (XRD), atomic force microscopy (AFM), scanning electron (SEM), dynamic mechanical thermal analyses (DMTA), differential calorimetry (DSC), thermogravimetric analysis (TGA), water contact angle absorption tests. results revealed that increasing exhibit higher values degree microphase separation, melting temperature segments, crystallinity, storage modulus (except for NC-55), but lower stability hydrophobicity. NC films hydrophobic their free surface energy range from 17.7 to 24.9 mJ m-2. This work highlights how composition would affect provide an additional intended designing advanced materials special biomedical applications.
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ژورنال
عنوان ژورنال: Journal of The Serbian Chemical Society
سال: 2022
ISSN: ['1820-7421', '0352-5139']
DOI: https://doi.org/10.2298/jsc220223036p