Study on Preparation and Properties of Hyperbranched Polyurethane/Multi-Walled Carbon Nanotubes Composites

Abstract:

With the Grafting to method, the hyperbranched polyurethane/multi-walled carbon nanotubes composites (MWNT-HBPU) was prepared. The reaction mechanism was covalently grafting hyperbranched polyurethane to multi-walled carbon nanotubes,through the reaction of the isocyanate groups of multi-walled carbon nanotubes (MWNT-NCO) and the hydroxyl groups of homemade hyperbranched polyurethane (HBPU). The structure and properties of the composites was studied by Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy (Raman), Thermal gravimetric analysis (TG) and Differential scanning calorimetry (DSC). The test results of FT-IR and TG showed that the prepared product was MWNT-HBPU; the DSC results demonstrated that the glass transition temperature of HBPU was significantly increased from 91.9°C to more than 99.7°C by the addition of MWNT-HBPU; the dispersion of the MWNT-HBPU was much better than the pure MWNT in solvents, such as N, N-dimethylformamide , Dimethyl sulfoxide etc.

• Periodical: Advanced Materials Research (Volume 716)
• Pages: 103-108
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.716.103
• Online since: July 2013
• Authors: Ning Sun, Jun Chao Wang, Chun Yun Feng, Yi Biao Li, Shao Hua Jiang, Zhi Mou Wu
• Keywords: Carbon Nanotube (CN), Hyperbranched Polyurethane, Modification, Property

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