Ionic conductivity values for segmented polyether polyurethaneurea (PEUU) complexes with LiClO_4 were determined and values as high as～1.1×10^(-4) S·cm^(-1) at 353K and～1.0×10^(-5)S·cm^(-1) at 30...Ionic conductivity values for segmented polyether polyurethaneurea (PEUU) complexes with LiClO_4 were determined and values as high as～1.1×10^(-4) S·cm^(-1) at 353K and～1.0×10^(-5)S·cm^(-1) at 306K were achieved. The ionic conductivity data were analyzed using the VTF (Vogel-Tamman-Fulcher) equation and WLF (Williams-Landel-Ferry) type equation. Values have been estimated for the 'apparent' activation energies of ion transport from VTF equation and they lie in the range 2.70—5.53 kJ·mol^(-1).展开更多
The chemorheology of bismaleimide (BMI) resin system comprised of 4,4'-bismaleimidodiphenyl-methane, 4,4'-diaminodiphenyl-methane, phenoltype epoxy resin, and carboxyl-terminated butadiene-acrylonitrile rubber...The chemorheology of bismaleimide (BMI) resin system comprised of 4,4'-bismaleimidodiphenyl-methane, 4,4'-diaminodiphenyl-methane, phenoltype epoxy resin, and carboxyl-terminated butadiene-acrylonitrile rubber was investigated. Thermal analysis techniques were employed to obtain Kinetic and network parameters which is necessary for the development of a phenomenological viscosity model based on a modified version of the Wiliams-Landel-Ferry (WLF) equation. The model predictions agreed well with experimental value of viscosity.展开更多
文摘Ionic conductivity values for segmented polyether polyurethaneurea (PEUU) complexes with LiClO_4 were determined and values as high as～1.1×10^(-4) S·cm^(-1) at 353K and～1.0×10^(-5)S·cm^(-1) at 306K were achieved. The ionic conductivity data were analyzed using the VTF (Vogel-Tamman-Fulcher) equation and WLF (Williams-Landel-Ferry) type equation. Values have been estimated for the 'apparent' activation energies of ion transport from VTF equation and they lie in the range 2.70—5.53 kJ·mol^(-1).
文摘The chemorheology of bismaleimide (BMI) resin system comprised of 4,4'-bismaleimidodiphenyl-methane, 4,4'-diaminodiphenyl-methane, phenoltype epoxy resin, and carboxyl-terminated butadiene-acrylonitrile rubber was investigated. Thermal analysis techniques were employed to obtain Kinetic and network parameters which is necessary for the development of a phenomenological viscosity model based on a modified version of the Wiliams-Landel-Ferry (WLF) equation. The model predictions agreed well with experimental value of viscosity.
