STUDIES OF BLENDS OF POLY(PHENYLENE SULFIDE) AND A LIQUID-CRYSTALLINEPOLYMER .1. COMPATIBILITY AND MECHANICAL-PROPERTIES

Blends of poly(phenylene sulphide) (PPS) and a liquid crystalline poly mer (LCP) have been investigated by differential scanning calorimetry (DSC). DSC results for these blends showed that the components were pa rtially miscible. In the injection moulded samples, the DSC thermogram s reveal a single melting peak whilst double melting peaks were observ ed in the pellets. Thermal properties such as T(m), T(sc), DELTAC(p) a nd DELTAH of the blends were determined. The thermal properties confir med that partial miscibility occurred for the blends. Bending properti es of the blends were also checked. Bending modulus was found to incre ase with increasing LCP content whilst the bending strength and elonga tion were found to reduce. These results are attributed to the stiffne ss of pure LCP.