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Journal of Materials Science

, Volume 29, Issue 18, pp 4708–4712 | Cite as

Ageing effects during isothermal crystallization of polypropylene blended with elastomers

  • W. Wenig
Papers

Abstract

The secondary crystallization of isotactic polypropylene in its blend with the elastomers ethylene-propylene-diene-terpolymer (EPDM) and trans-polyoctenylene (TOR), which occurs during isothermal crystallization, has been measured by time-dependent recording of X-ray wide-angle scattering. From the results, Avrami exponents were determined, which show that secondary crystallization takes place primarily within the already formed spherulites. Avrami exponents of the primary crystallization have been determined by the same method and also by observation of the spherulitic growth in the polarization microscope. It was found that both elastomers have different effects on the crystallization behaviour of the polypropylene.

Keywords

Polymer Crystallization Polypropylene Crystallization Behaviour Ageing Effect 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • W. Wenig
    • 1
  1. 1.Laboratory of Applied PhysicsUniversity of DuisburgDuisburgGermany

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