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Morphology of different types of isotactic polypropylene spherulites crystallized from melt

โœ Scribed by Hiroshi Awaya

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
796 KB
Volume
29
Category
Article
ISSN
0032-3861

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The spherulitic structure of isotactic polypropylene (iPP) from the melt was studied by polarized light and scanning electron microscopy. From the crystallization morphology, it can be observed that crystallization of iPP from the melt below 132ะŠC forms two types of spherulites, termed aand b-spheru

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## Abstract Melt history, pressure, and crystallization temperature are three variables that may be used to vary spherulite size in polymer systems. In this study, bulk polypropylene samples were given various melt treatments and then isothermally crystallized under constant pressure. Spherulite si