Measurements of the Photoelastic and Elastic Constants of Drawn Films and Extruded Rods of Polypropylene with Brillouin Light Scattering.
Abstract
The elastic constants C(11), C(33), C(44), C(13) of oriented poly(propylene) films are measured with Brillouin scattering and are compared with the elastic constants obtained from extruded poly(propylene) rods. The photoelastic constants P(12), P(13) and (P31) of the extruded rod samples are measured by comparison to a poly(methylmethacrylate) reference scatterer. In the film samples, the relative values of the photoelastic constants P(11), P(33), P(13) and P(31) are measured by comparison of the quasilongitudinal and quasitransverse intensities at several directions of sound propagation. Within the experimental error, P(13), P(31) and P(12) are found to be unaffected by extrusion or stretching. P(11) and P(33) are found to change in relation to P(31) in the film samples. The results are interpreted by considering the chain morphology and the theory of photoelastic interaction. The changes in the Brillouin intensities are due to changes in the elastic constants rather than due to the photoelastic constants. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 26, 1981
- Accession Number
- ADA101611
Entities
People
- C. H. Wang
- David B. Cavanaugh
Organizations
- University of Utah