3.9 Article

Polypropylene Blends with m-EPR Copolymers: Structure, Morphology and Thermal Properties

Journal

POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING
Volume 57, Issue 3, Pages 229-241

Publisher

TAYLOR & FRANCIS INC
DOI: 10.1080/03602559.2017.1320720

Keywords

Blends; interfaces; morphology; structure-property relationships

Funding

  1. Ministry of Science, Education and Sports of the Republic of Croatia
  2. Ministry of Higher Education, Science and Technology of the Republic of Slovenia

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The effects of different contents of two metallocene propylene-based m-EPR elastomers on structure, morphology, thermal, and dynamic mechanical properties of the isotactic polypropylene/m-EPR blends were investigated. The both m-EPR copolymers have been built in isotactic polypropylene matrix as amorphous phase. However, the nucleation effect at lowest addition (2.5vol%) and the solidification effect along with increased m-EPR's additions have caused changes of the crystallinity degree and the size of spherulites in the isotactic polypropylene matrix. Higher degree of miscibility/compatibility of the isotactic polypropylene/m-EPR2, with lower viscosity has been observed. Homogeneous dispersion of m-EPR particles as well as their radial distribution has been observed. [GRAPHICS] .

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