Morphology of a melt crystallized iPP/HDPE/hydrogenated hydrocarbon resin blend |
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Authors: | Clara Silvestre Sossio CimminoBeniamino Pirozzi |
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Affiliation: | a Istituto di Chimica e Tecnologia dei Polimeri, CNR, Via Campi Flegrei, 34, 80078 Pozzuoli, NA, Italy b Dipartimento di Chimica, Università di Napoli, ‘Federico II’, Via Cinzia, 80134 Napoli, Italy |
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Abstract: | The structure, phase structure, morphology, crystallization and melting behavior of isotactic polypropylene (iPP) blended with a master batch (MB), formed by high density polyethylene and hydrogenated hydrocarbon resin (iPP/MB), have been in details investigated by using X-ray diffraction, optical microscopy and differential scanning calorimetry. It was found that the structure and morphology depend on crystallization conditions. A new family of α spherulites of iPP (type I spherulites) can be activated using appropriate crystallization conditions. Nucleation of these spherulites has been explained by using the approach of nucleus migration in polymer blends. Type I spherulites present specific morphological, kinetic and thermal behaviors. In particular it was found that the growth rate of type I spherulites, at a given Tc, is higher than the growth rate of spherulites grown from plain iPP. |
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Keywords: | Spherulites Hydrogenated hydrocarbon resin Isotactic polypropylene (iPP) |
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