Abstract
Brillouin scattering measures the velocity and attenuation of hypersonic (10**8-10**1**2 Hz) waves and provides a convenient method of studying the high frequency relaxation behavior of the medium in which the sound waves propagate. The laser light scattered off the sound waves is analyzed by a high resolution Fabry-Perot interferometer and the recent development of multipassing, in which the beam is passed three or five times through the interferometer, allows the study of optically imperfect samples. A brief description of equipment developed by the authors along with necessary mathematical techniques, is followed by a presentation of the field of applications for instrument developed. MPFPS has been applied to the study of the structural changes induced in poly(methylmethacrylate) on orientation. This type of study can be extended to other materials and will help in understanding the mechanism of void formation. However, to date most Brillouin work on polymers has been directed toward understanding the glass transition and the effects of crosslinking on chain flexibility. The present paper is concerned with recent progress in this work.
| Original language | English (US) |
|---|---|
| Title of host publication | American Chemical Society, Polymer Preprints, Division of Polymer Chemistry |
| Pages | 145-147 |
| Number of pages | 3 |
| Volume | 18 |
| Edition | 2 |
| State | Published - Aug 1977 |
| Externally published | Yes |
| Event | Symp on Novel Instrum Methods for Probing Polym Struct, Presented at Am Chem Soc Natl Meet, 174th - Duration: Aug 28 1977 → Sep 2 1977 |
Other
| Other | Symp on Novel Instrum Methods for Probing Polym Struct, Presented at Am Chem Soc Natl Meet, 174th |
|---|---|
| Period | 8/28/77 → 9/2/77 |
ASJC Scopus subject areas
- Polymers and Plastics