Effects of C₆₀ on the Glass Transition Temperature of Carbazole-based Photorefractive Polyphosphazenes

Abstract

The bi-functional carbazole-based photorefractive polyphosphazenes with different content of C₆₀-doped were fabricated. The glass transition temperature (T _g) of these polymer composite materials was determined using a differential scanning calorimetric (DSC) method. According to the DSC measurement results with different heating rates, the variation of T _g and the active energy of glass transition (E _g) were analyzed in detail. The analysis results indicate that the transition region shifts to higher temperatures with increasing heating rate, and C₆₀ content (below 1.0wt%) can influence the T _g of photorefractive polyphosphazenes. The T _g first increases and then decreases with the C₆₀ content (below 1.0wt%). The probable causes of the influence of C₆₀ on T _g was proposed.

Keywords

differential scanning calorimetric (DSC) / fullerene C₆₀ / carbazole-based photorefractive polyphosphazenes / glass transition temperature (T _g) / active energy of glass transition (E _g)