| Автор | D A Thomas |
| Автор | D W Robinson |
| Дата выпуска | 1955-02-01 |
| dc.description | A cantilever resonance method has been used to measure the complex Young's modulus of polyisobutylene from 90 to 560° K at a number of points in the frequency range 30-300 c/s. Using the method of reduced variables, the results have been expressed as a function of frequency at constant temperature and compared with other published data on this material over comparable reduced frequency ranges. Agreement is quite good over a limited reduced frequency range, but the present results predict a higher value for the real part of the modulus at infinitely high frequencies, and show the small dispersion peak in the imaginary modulus curve displaced to a higher reduced frequency. The validity of extrapolating the frequency shift factor to high and low temperatures is questioned, and suggested as a possible explanation for the discrepancies. A comparatively large value of the temperature coefficient of the modulus at 90° K suggests that an appreciable configurational entropy term is still contributing to the free energy of the polymer at these low temperatures. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Some dynamic mechanical properties of polyisobutylene over a wide temperature range |
| Тип | paper |
| DOI | 10.1088/0508-3443/6/2/301 |
| Print ISSN | 0508-3443 |
| Журнал | British Journal of Applied Physics |
| Том | 6 |
| Первая страница | 41 |
| Последняя страница | 43 |
| Аффилиация | D A Thomas; Imperial Chemical Industries Ltd., Plastics Division, Welwyn Garden City, Herts |
| Аффилиация | D W Robinson; Imperial Chemical Industries Ltd., Plastics Division, Welwyn Garden City, Herts |
| Выпуск | 2 |
