Investigation of glass transition kinetics in C-60-doped carbazole-based photorefractive polyacrylates

摘要

This article describes the fabrication of C-60-doped carbazole-based bi-functional photorefractive polyacrylates, the C-60-doped concentrations are 0.0, 0.2, 0.5, 0.7 and 1.0 wt.-%, respectively. For these photorefractive polyacrylates, differential scanning calorimetric runs have been taken under nonisothermal conditions at different heating rates. The result indicates that the glass transition temperature T-g first increases and then decreases with increasing of C-60 content. T-g of the same sample increases with increasing heating rate. The activation energy of glass transition (E-g) has been evaluated based on the Moynihan and Kissinger model. The results showed that both E-g values obtained from Kissinger's and Moynihan's relations are in good agreement.