Abstract: The non-isothermal crystallization of polypropylene(PP)with or without a rosin type nucle ating agent was studied using differential scanningcalorimetry(DSC).The result shows that the crystal lization temperature of PP filled rosin type nucleating agent can be improved.The analysis using Jeziorny methods showed that Zand todecreased with the introduction of nucleating agent and dispersant. The Avrami index n was also changed indicating a somewhat different nucleation mechanism.

Key words: rosin type nucleating agent, polypropylene, dispersant, non-isothermal crystallization, kinetics