A new technique for following rapid rates of crystallization II Isotactic polypropylene

The depolarized light intensity technique has been used to follow the crystallization of isotactic polypropylene. Crystallization rate constants of the same magnitude as recently published literature values derived from dilatometer measurements have been obtained. A maximum in the crystallization ra...

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Bibliographic Details
Published in:Polymer (Guilford) 1962, Vol.3, p.35-42
Main Author: Magill, J.H.
Format: Article
Language:English
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Summary:The depolarized light intensity technique has been used to follow the crystallization of isotactic polypropylene. Crystallization rate constants of the same magnitude as recently published literature values derived from dilatometer measurements have been obtained. A maximum in the crystallization rate is believed to occur in the region of 60° to 70°C. Induction times were derived from the rate data. The generation of nuclei is simultaneous or predetermined and the morphology spherulitic above about 115°C. Below this temperature nuclei are sporadically formed (in time) and the geometry of the crystallized specimen ranges from spherulitic to unidentifiable shapes.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(62)90064-2