Structural Characterization and Relaxation Processes of the Inner Crystalline Core in Foams Based on Polyethylene/Polypropylene Blends

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Abstract

Injected foams obtained from blends with different compositions of isotactic polypropylene, iPP, and two different low density polyethylenes, LDPE, were analyzed by X-Ray diffraction, differential scanning calorimetry, and dynamic mechanical thermal analysis. Most of the results on the blends can be simulated as a weighed addition of the two pure components, indicating practical immiscibility. Some features about the crystallization of the iPP component pointed out inhibition and, consequently, a delay in the development of monoclinic crystalline entities.

Journal

  • Polymer Journal

    Polymer Journal 35 (12), 920-928, 2003

    The Society of Polymer Science, Japan

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