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Polypropylene Crystallization in an Ethylene-propylene-diene Rubber Matrix

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Abstract

The effect of the incorporation of an amorphous immiscible polymer (ethylene-propylene-diene- terpolymer) on the PP crystallization kinetics and thermodynamics is investigated by thermal analysis. The results of the investigation have shown that EPDM acts as a nucleant agent. A marked decrease of the half time of PP crystallization, τ1/2 , as well as a sensible increase of the overall crystallization rate, K n , has been observed in the presence of EPDM. Moreover, at any crystallization temperature, a minimum of τ1/2 , is obtained at 25% EPDM content in the blend. The Avrami model has been successfully applied to describe the crystallization kinetics of the blend. The kinetic curves obtained under non-isothermal conditions confirm the results obtained under isothermal conditions and demonstrate the nucleant action of the EPDM phase on the PP crystallization.

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Authors and Affiliations

  1. Institute of Polymer Science and Technology, Madrid, Spain

    M. A. López Manchado

  2. Materials Engineering Center, University of Perugia, Loc. Pentima bassa 21, 05100, Terni, Italy

    J. Biagiotti, L. Torre & J. M. Kenny

Authors
  1. M. A. López Manchado
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  2. J. Biagiotti
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  3. L. Torre
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  4. J. M. Kenny
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López Manchado, M.A., Biagiotti, J., Torre, L. et al. Polypropylene Crystallization in an Ethylene-propylene-diene Rubber Matrix. Journal of Thermal Analysis and Calorimetry 61, 437–450 (2000). https://doi.org/10.1023/A:1010165317028

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