A simple model for heterogeneous nucleation of isotactic polypropylene

Michael P. Howard, Scott Thomas Milner

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

A model for heterogeneous nucleation of isotactic polypropylene in terms of a "cylindrical cap" with the critical size and barrier set by a contact angle is described. Quiescent crystallization data for bulk samples of isotactic polypropylene are analyzed to extract a contact angle in the range of 40 to 70 with a mean value of 56, which corresponds to a factor of 6 decrease in the critical barrier from the homogeneous case. This value is in reasonable agreement with the contact angle of 79 ± 3 estimated from molecular scale theory (DOI 10.1021/ma400703m). This model could be combined with calculations from melt rheology of entropy reduction due to flow to frame discussions of flow-induced crystallization.

Original languageEnglish (US)
Pages (from-to)6593-6599
Number of pages7
JournalMacromolecules
Volume46
Issue number16
DOIs
StatePublished - Aug 27 2013

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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