Preparation and characterization of polyurethane–carbon nanotube composites

Citations Over TimeTop 10% of 2005 papers

Abstract

Well-dispersed and long-term stable carbon nanotubes/polyol dispersions were prepared by a mechanochemical approach with the aid of dispersing agent. Polyurethane (PU)-carbon nanotube nanocomposites were prepared by further polymerization. Multi-walled carbon nanotubes (MWNT) can be dispersed individually. Fourier transform infrared (FTIR) spectra suggested that the addition of carbon nanotubes improved the degree of phase separation of polyurethane. Dynamic mechanical analysis (DMA) suggested that glass transition temperature () of polyurethane decreased with increasing carbon nanotube content slightly. Tensile test suggested that MWNT is more helpful to improve the modulus than single-walled carbon nanotube (SWNT), which is more favourable to improve the elongation of polyurethane. The different reinforcing effects of MWNT and SWNT on PU were correlated to the shearing thinning exponent and the shape factor of carbon nanotubes in polyol dispersion. Raman shift of SWNTs can reflect the dispersion state of SWNT in polyol or in PU, and the interaction between polymer and SWNT. Both SWNT and MWNT can improve the thermal stability of polyurethane and thermal conductivity.

Related Papers

• → Recent Advances in Functional Polyurethane Chemistry: From Structural Design to Applications(2023)67 cited
• Synthesis and Characterization of Flexible and Rigid Polyurethane Foam(2014)
• Research progress and application of functional polyurethane materials(2007)
• Research progress of aqueous polyurethane dispersions(2004)
• Recent Developments in the Study of Anionic Aqueous Polyurethane(2007)