Birefringence Studies of the Relaxation of Ethylene-Methacrylic Acid Copolymers and Their SaltsJournal of Applied Physics (1970)
The strain-optical coefficient of ethylene-methacrylic acid copolymers is measured in static and dynamic experiments as a function of temperature and degree of ionization. An alpha optical loss peak which corresponds to a mechanical loss peak is found for the ionized salt but not for the un-ionized acid. This peak is associated with mobility of an ionized domain. Birefringence relaxation curves are found to be superposable using horizontal and vertical shift factors. A plot of the logarithmic shift factor against (1/T) gives a broken curve exhibiting two activation energies for the salt indicating contributions by two processes.
- Birefringence studies,
- caid copolymers,
Citation InformationWilliam MacKnight. "Birefringence Studies of the Relaxation of Ethylene-Methacrylic Acid Copolymers and Their Salts" Journal of Applied Physics Vol. 41 Iss. 11 (1970) p. 4361 - 4367
Available at: http://works.bepress.com/william_macknight/26/