4.3 Article

Transparent and Flexible Films of Thermoplastic Polyurethanes Incorporated by Nano-SiO2 Modified With 4,4′-Methylene Diphenyl Diisocyanate

出版社

TAYLOR & FRANCIS AS
DOI: 10.1080/00914037.2014.886237

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Nanosilica; polyurethane-based nanocomposite; surface modification; UV-vis DRS

资金

  1. School of Chemistry
  2. Research Council of Damghan University

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4,4'-Methylene diphenyl diisocyanate (MDI) played a dual role for preparing thermoplastic polyurethanes (TPU)/silica nanocomposites; both as monomer to synthesize MDI-capped poly(tetramethylene oxide) (PTMO) and as surface modifier of nano-SiO2 particles. Untreated and/or MDI-treated SiO2 were homogeneously incorporated into the resulting TPU polymer after extension of the chains by 1,4-butanediol (BDO). To modify silica nanoparticles, MDI was grafted to the surface silanol groups of the nanoparticles by forming urethane links. MDI-treated SiO2 (SiO2-MDI) nanoparticles, as well as TPU/untreated SiO2 (TPU/SiO2) and TPU/MDI-treated SiO2 (TPU/SiO2-MDI) nanocomposites were characterized by FT-IR, UV-vis DRS, XRD, SEM, mechanical, and thermal analyses. [GRAPHICS] .

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