Brillouin Scattering Studies of the Effect of Orientation on Mechanically Deformed Poly (ethylene Terephthalate).
Abstract
Brillouin scattering is used as a tool for the study of the internal structure of oriented films of poly(ethylene terephthalate). Splitting in the longitudinal spectrum is observed as the film is stretched, indicating that the crystalline region is developed gradually from the amorphous region, and scattering from each region occurs independently. The hypersonic velocity data obtained from these two regions are used to draw directional maps of sound velocity propagating in different directions of the film. The results are discussed and correlated with a recently proposed model. The orientational parameter in the amorphous phase is calculated from the hypersonic velocity data as a function of stretch ratio. The results are found in good agreement with the published values obtained by using a different technique. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 18, 1980
- Accession Number
- ADA093222
Entities
People
- C. H. Wang
- David B. Cavanaugh
Organizations
- University of Utah