Montmorillonite-Multiwalled Carbon Nanotube Nanoarchitecture Reinforced Thermoplastic Polyurethane

摘要

Montmorillonite (MMT)-multiwalled carbon nanotube (MWCNT) hybrids were prepared in different weight ratios by simple dry grinding method and characterized. Subsequently, MMT-MWCNT (1: 1) hybrid was used as reinforcing filler in developing thermoplastic polyurethane (TPU) nanocomposites by solution blending method. Thermogravimetric analysis showed that 0.25 wt% hybrid-loaded TPU nanocomposite exhibited maximum enhancement of 31 degrees C corresponding to 50 wt% loss in thermal stability when compared with neat TPU. Differential scanning calorimetry of this composite also indicated that its crystallization and melting temperatures are enhanced by 37 and 13 degrees C, respectively. Mechanical data showed that tensile strength and Young's modulus of 0.50 wt% filled TPU were maximum improved by 57 and 87.5%, respectively. Dynamic mechanical analysis (DMA) measurements indicated 174% (50 degrees C) improvement in storage modulus of 0.50 wt% hybrid-loaded TPU. Such improvements in thermal and mechanical properties have been attributed to homogeneous dispersion, strong interfacial interaction, and synergistic effect. (C) 2014 Society of Plastics Engineers