Multiwalled carbon nanotube/polypropylene (MWNT/PP) composites were prepared by melt blending. The crystallographic form and non-isothermal crystallization kinetics of polypropylene (PP) and MWNT/PP composites were investigated by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Mo equation was used to indicate the kinetics of non-isothermal crystallization of PP and MWNT/PP composites. The results show that
the addition of multiwalled carbon nanotube (MWNT) leads to the transition of PP from β crystallographic form to a crystallographic form. MWNT has an obvious nucleating effect on the crystallization of PP
increasing crystallization temperature and crystallization rate. On the contrary
the activation energies of MWNT/PP composites are higher than that of pure PP. MWNT can decrease the cooling rates of PP needed to reach relative crystallinities in a unite time.