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A comparison study on the homogeneity and heterogeneity fiber induced crystallization of isotactic polypropylene

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Abstract

The crystallization behavior of iPP in composites with PET, Nylon-6 and its own fibers under various conditions was studied using an optical microscope equipped with a hot stage. The results show that the nucleation capacity of PET and Nylon-6 fibers towards the iPP matrix is mainly controlled by the shear flow of the iPP matrix during sample preparation. When the composites were prepared at a temperature where the iPP was kept in its supercooled state, the nucleation of iPP on the PET and Nylon-6 fiber surfaces was enhanced due to the shearing of the iPP melts caused by introduction of the fibers. The nucleation was markedly reduced by keeping the composites at the fiber introduction temperature for a short time to relax the shear flow of the iPP matrix. The nucleation of iPP on its own fiber, however, is mainly related to the nature of the iPP fiber itself. No detectable morphological change of iPP on its own fiber can be identified under all thermal conditions used in this study.

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Acknowledgement

The financial support of the Natural Science Foundation of China (No.20244003) and the CAS hundred talents program are gratefully acknowledged.

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Authors and Affiliations

  1. State Key Laboratory of Polymer Physics and Chemistry, Center for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, 100080, Beijing, China

    Huihui Li, Jichun Liu, Dujin Wang & Shouke Yan

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  1. Huihui Li
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  2. Jichun Liu
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  3. Dujin Wang
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  4. Shouke Yan
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Correspondence to Shouke Yan.

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Li, H., Liu, J., Wang, D. et al. A comparison study on the homogeneity and heterogeneity fiber induced crystallization of isotactic polypropylene. Colloid Polym Sci 281, 973–979 (2003). https://doi.org/10.1007/s00396-003-0865-6

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  • DOI: https://doi.org/10.1007/s00396-003-0865-6

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