Flow‐induced crystallization of polypropylene in stretched ribbons

P. G. Andersen*, Stephen Howard Carr

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Ribbons of molten polypropylene have been extruded into a thermostatted chamber and subjected to elongations ranging as high as 4400‐fold. Some of these ribbons have been shown to possess the unusual ability of recovering nearly all of the strain from large levels of stretch (≤100 percent). This property, as well as the magnitude of the tensile yield drop, has been found to be directly proportional to the uniaxial character of the flow present at the moment of crystallization. The structure in the final solid films has been characterized by wide angle X‐ray diffraction and crystal orientation distribution. Both of these factors have been found to be proportional to the character of flow at the moment of crystallization. Finally, the temperature in the thermostatted chamber has been shown to affect the character of the flow.

Original languageEnglish (US)
Pages (from-to)217-221
Number of pages5
JournalPolymer Engineering & Science
Volume16
Issue number3
DOIs
StatePublished - Jan 1 1976

ASJC Scopus subject areas

  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

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