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Homogeneous nucleation of the dispersed crystallisable component of immiscible polymer blends

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Summary

Immiscible melt mixed blends of a crystallisable polyolefin (isotactic polypropylene, PP) and atactic polystyrene (PS) were prepared in a wide composition range. It was found that when PP is the major component in the blend its crystallisation behaviour is not affected by blending it with PS. However if PP is the minor component, it will be dispersed in the immiscible PS matrix, hence the nucleation mechanism changes from predominantly heterogeneous to predominantly homogeneous as long as the size of the dispersed PP droplets is below a critical value (of the order of 1–2 μm).

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Authors and Affiliations

  1. Grupo de Polímeros USB, Departamento de Ciencia de los Materiales, Universidad Simón Bolívar, Apartado 89000, 1080-A, Caracas, Venezuela

    O. O. Santana & A. J. Müller

Authors
  1. O. O. Santana
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  2. A. J. Müller
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Santana, O.O., Müller, A.J. Homogeneous nucleation of the dispersed crystallisable component of immiscible polymer blends. Polymer Bulletin 32, 471–477 (1994). https://doi.org/10.1007/BF00587890

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  • DOI: https://doi.org/10.1007/BF00587890

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