Investigation of the effect of spherulite size on the strength and deformation characteristics of isotactic polypropylene films

  • V. I. Pavlov


Experiments on isotactic polypropylene films were used to study the relationship between parameters of the tensile stress/strain diagram and the size of supermolecular structure elements (spherulites). Certain qualitative and quantitative laws were established. Test results showed that the spherulite size affects almost all the mechanical properties studied (except the recrystallization stress), especially the parameters characterizing the deformation of polypropylene. Microscopic examination showed that the rupture of spherulitic structures in most cases takes place along the spherulite boundaries. Such ruptures can be attributed to the unavoidable presence of large defects between spherulites in the initial polymer films.


Polymer Mechanical Property Recrystallization Polypropylene Microscopic Examination 
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Copyright information

© The Faraday Press, Inc. 1971

Authors and Affiliations

  • V. I. Pavlov
    • 1
  1. 1.Institute of the Chemistry of High-Molecular CompoundsAS USSRKiev

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