Crystallization behavior of isotactic polypropylene based nanocomposites |
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Authors: | V. Causin Carla Marega Roberta Saini A. Marigo G. Ferrara |
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Affiliation: | (1) Dipartimento di Scienze Chimiche, Universitŕ di Padova, via Marzolo 1, 35131 Padova, Italy;(2) Basell Poliolefine Italia SpA — Centro Ricerche ‘Giulio Natta’, P.le Donegani 12, 44100 Ferrara, Italy |
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Abstract: | The effect of clay dispersion on the crystallization behavior of isotactic polypropylene (iPP)-based nanocomposites is reported. The T m0 of the materials was calculated by the method proposed by Marand, the kinetics of crystallization was evaluated by the Avrami analysis and also the Hoffman-Lauritzen theory of crystallization regimes was applied. Montmorillonite was found to depress T m0, to enhance the rate of crystallization and to ease the chain folding of macromolecules. These effects were magnified if clay was exfoliated, rather than intercalated. |
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Keywords: | DSC montmorillonite nanocomposites polypropylene SAXS thermal analysis WAXD |
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