Morphology of a melt crystallized iPP/HDPE/hydrogenated hydrocarbon resin blend

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 m...

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Bibliographic Details
Published in:Polymer (Guilford) 2003-07, Vol.44 (15), p.4273-4281
Main Authors: Silvestre, Clara, Cimmino, Sossio, Pirozzi, Beniamino
Format: Article
Language:English
Subjects:
Applied sciences
Crystallization
Exact sciences and technology
Hydrogenated hydrocarbon resin
Isotactic polypropylene (iPP)
Organic polymers
Physicochemistry of polymers
Properties and characterization
Spherulites
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Summary: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 T c, is higher than the growth rate of spherulites grown from plain iPP.
ISSN:0032-3861
1873-2291
DOI:10.1016/S0032-3861(03)00393-8