STUDY OF THE MOLECULAR STRESS RESPONSE OF SOLID POLYMERS BY PHOTOELASTIC METHODS
Abstract
The effect of stereospeci ic structure on photoelastic behavior of solid polymers was studied. Stress-optical coefficients of several polymers were measured at several temperatures. Isotactic, syndiotactic, and stereo-block polymethyl methacrylates were compared a d showed small, but definite differences. Isotactic and atactic polystyrene also showed a small but definite difference in stress-optical coefficient. T e sign of the stress-optical coefficient for polymethylACRYLATE AN POLYMETHYL METHACRYLATE IN THE GLASSY STATE IS OPPOSITE, +7 and -4 Brewsters, respectively. The stress-optical coefficient of polymethyl methacrylate becomes more negative with decreasing molecular weight.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 23, 1962
- Accession Number
- AD0283457
Entities
People
- R. D. Andrews Jr.
Organizations
- Massachusetts Institute of Technology