Isothermal Bulk Crystallization Kinetics of Isotactic Polypropylene Component

5 Isothermal Bulk Crystallization Kinetics of Isotactic Polypropylene Component 

The isotherms of crystallization of pure iPP and iPP in the ternary blends showed that the overall crystallization rate constant in most cases decreases with the decrease in the amount of iPP in the blend and, with a constant fraction of iPP, increases when the fraction of HOCP decreases (Table 6.15). For all the examined samples, values of Avrami exponent, n, close to 3 have been obtained, suggesting a three-dimensional growth of crystalline unit, developed by heterogeneous nucleation. 

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