Accession Number:

ADA099933

Title:

Annealing of Polypropylene Films Crystallized from a Highly Extended Melt,

Descriptive Note:

Corporate Author:

OAK RIDGE NATIONAL LAB TN

Report Date:

1980-06-04

Pagination or Media Count:

12.0

Abstract:

The crystalline microstructure of thin films of isotactic polypropylene drawn from melt at a very high rate of extension transmission micrography was examined by dark-field micrography and X-ray scattering. Annealing at temperatures below 100 degrees C produced no qualitative change in the electron microscope observations, but between 110 and 150 degrees C produced gradual dominance of lamellar crystals, oriented normal to the drawn direction. Small angle x-ray scattering data exhibited a strong streaking normal to the fiber axis in broad agreement with the observed fibrosity. Author, modified-PL .

Subject Categories:

  • Plastics
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE