The microstructure and the thermal and mechanical properties of injection molded samples of different blends of Vectra (LCP) and poly(butylene terephthalate) (PBT) have been studied. Differential scanning calorimetry and hot-stage polarized light microscopy showed that the crystallization of PBT was unaffected by the presence of LCP. X-ray diffraction showed that the PBT component was always unoriented in the injection molded samples. Blends with less than 28 vol% LCP exhibited the same stiffness and the same coefficient of linear thermal expansion as PBT. Blends containing more than 38 vol% LCP contained an oriented LCP phase and had a stiffness in accordance with the upper-bound composite equation. The coefficients of linear ther-mal expansion for these blends were close to that of pure LCP.