The structure, phase structure, morphology, crystallization and melting behaviour of isotactic polypropylene 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 a 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 behaviours. 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.
Morphology of a melt crystallized iPP/HDPE/Hydrogenated hydrocarbon resin blend
Cimmino S;Silvestre C;
2003
Abstract
The structure, phase structure, morphology, crystallization and melting behaviour of isotactic polypropylene 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 a 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 behaviours. 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
