Abstract
The surface structure of melt-mixed blends of bisphenol A polycarbonate (PC) and poly(ethylene terephthalate) (PET) was investigated by Fourier transform infrared attenuated total reflectance (FTIR ATR) spectroscopy. Based on the peak intensity of the aromatic carbonate band for PC and the aliphatic ester band for PET by using germanium and KRS-5 ATR crystals, the enrichment of the PET component in the surface layer of PC/PET blend films was observed. This surface enrichment of PET component was also enhanced by decreasing the PET molecular weight. The peak position of the aromatic carbonate band for PC shifted to higher frequencies with increasing PET weight fraction, while that of the aliphatic ester band for PET shifted to higher frequencies with increasing PC weight fraction. The peak shift for both PC and PET by using a germanium crystal was, however, relatively small. This means that a self-association state of each component is kept relatively well in the outer surface layer. Furthermore, the self-...
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