Quantitative Analysis of Stacking Faults in Lamellar Crystals of Syndiotactic Polypropylene Grown from the Melt

Abstract

The probability of presence of stacking faults in melt-grown lamellar crystals of syndiotactic polypropylene(sPP) was estimated from the half-breadth of the streaked reflections. The probability values, p, showed strong dependence on crystallization temperature, as well as on the degree of stereoregularity of the sample. When the p values were plotted against supercooling, the data were expressed by a master curve, and accordingly, the quantity of stacking faults is thought to be determined mainly kinetically, viz. by the growth rate.