The thermal properties of blends of polycarbonate (PC) and poly(ε-caprolactone) (PCL) were investigated by differential scanning calorimetry (DSC). From the thermal analysis of PC-PCL blends, a single glass-transition temperature (Tg) was observed for all the blend compositions. These results indicate that there is miscibility between the two components. From the modified Lu and Weiss equation, the polymer-polymer interaction parameter (χ12) of the PC-PCL blends was calculated and found to range from -0.012 to -0.040 with the compositions. The χ12 values calculated from the Tg method decreased with the increase of PC weight fraction. By taking PC-PCL blend as a model system, the values of χ12 were compared with two different methods, the Tg method and melting point depression method. The two methods are in reasonably good agreement for the χ12 values of the PC-PCL blends.
|Number of pages||5|
|Journal||Journal of Polymer Science, Part B: Polymer Physics|
|Publication status||Published - 2000 Aug 1|
ASJC Scopus subject areas
- Materials Chemistry
- Polymers and Plastics