Graft side-chain liquid crystalline functional copolymers based upon acrylic acid-functionalized polypropylene (PP-AA) were assessed as compatibilizers for polypropylene/liquid crystalline polymer (LCP) polyblend fibres. The compatibilization effect observed was found to be dependent upon the liquid crystalline phase temperature range of the compatibilizer, with the most favourable being in a liquid crystalline state during fibre melt extrusion and hot drawing, thus contributing a lubricating effect to the blend and giving enhanced physical properties as a result.