Polyurethane Nanocomposites Crosslinked with Amino Terminated Poly(dimethylsiloxane) Functionalized Multi-Walled Carbon Nanotubes
A new route to synthesize polymeric carbon nanotube (CNTs)/polyurethane (PU) nanocomposites has been developed. Multiwalled CNTs functionalized by chemical modification of amino terminated poly(dimethylsiloxane) (ATPD) were incorporated as a crosslinker. Raman microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis were used to characterize the ATPD functionalized CNTs (ATPD-CNTs). The dispersibility of ATPD-CNTs in the nanocomposites, the dynamic mechanical properties and thermal stability of the PU nanocomposites were also investigated. The results indicated ATPD was grafted on the surface of CNTs via an amidation reaction. ATPD-CNTs was well dispersed in PU matrix. The dynamic mechanical analysis results indicated lowering of storage modulus and enhancement of chain flexibility for ATPD-CNTs/PU compared to pristine PU. The nanocomposites crosslinked by ATPD also showed an improved thermal stability.
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Document Type: Research Article
Publication date: January 1, 2015
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