Polymorphism and transcrystallization of syndiotactic polystyrene composites filled with carbon nanotubes

► CNTs enhance the sPS crystallization by heterogeneous nucleation. ► CNTs favor the formation of beta-form sPS crystal. ► Glass transition temperature of sPS remains unchanged after CNT addition. ► Equilibrium melting temperature of sPS remains unchanged after CNT addition. ► Transcrystallization of sPS takes place on the CNT surface.