Abstract
The effects of triphenyl phosphite (TPPi) and disodium diphosphate (DSDP) on the trans-esterification between poly(butylene terephthalate) (PBT) and polycarbonate (PC) in melt mixing and the mechanical properties of PBT/PC blends were studied. The experimental results showed that the Vicat temperature of the blends increased because of the addition of TPPi or DSDP. DSDP had little effect on the mechanical properties of the toughened PBT/PC blends containing poly(ethylene–butylacrylate-glycidyl methacrylate) (PTW) as toughener, and TPPi led to a decrease in the notched Izod impact strength of the toughened PBT/PC blends. DSDP was confirmed to be an effective stabilizer for the trans-esterification of PBT and PC, using the methods of Fourier Transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD) and solvent extraction.