The Effect of Pigments on the Crystallization and Properties of Polypropylene

Add time:08/27/2019    Source:sciencedirect.com

ABSTRACTThe effect of pigments having different chemical composition on the crystallization process of polypropylene, PP, was studied by means of differential scanning calorimeter in isothermal mode. Analysis of the experimental results was carried out using Avrami's equation to obtain the crystallization parameters. Furthermore, Lipatov's approach was applied for evaluation of the thickness and content of the transition layers formed as a result of the interaction between the PP and the various pigments. Results have shown that depending on their composition the pigments act like nucleating agents affecting the degree of crystallinity, the structure of the amorphous phase and the interphase between the PP and the different pigments. The resultant morphology has been associated with the mechanical properties of the various pigmented PP compositions.

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