Vapor-induced crystallization behavior of bisphenol-A polycarbonate

摘要

The effects of exposure time and vapor pressure on the crystallization behaviors of bisphenol-A polycarbonate (BAPC) films were investigated at 25 degrees C by using differential scanning calorimetry (DSC). Double melting peaks were observed for various BAPC samples after vaporinduced crystallization. The low temperature melting peak shifted to higher temperature and became sharper with increasing exposure time, and could be assigned to defective crystals with smaller crystal size. Crystallinity and average crystal dimension normal to (020) were calculated from wide-angle X-ray diffraction spectra. A good agreement was obtained between crystallinity values obtained from WAXD and those from DSC.