Effect of β-nucleator content on the isothermal and nonisothermal crystallization of β-phase polypropylene was studied using differential scanning calorimetry. The melting curves of the foregoing samples at isothermal and non-isothermal crystallization condition were also measured in DSC-2. The results obtained indicated that the sample containing 0.005% β-nucleator have the highest β-form crystallinity as expressed by △Hmβ the highest melting temperature of β-form and lower α-form crystallinity. The WAXD measurement shows that the samples

crystallized in the presence of higher content of nucleator

have lower relative inten-sity of β(301) diffraction peak which signifies the lower order of packing of β-form crystals along the chain direction.