In this study, photorefractive polymer composites were developed in which polycarbonate was doped with a dual-function dopant and a photocharge generation sensitizer. The dual-function dopant has the function of providing both charge transport and optical nonlinearity. The composites' photoconductiv
Influence of cohesive forces on the glass transition temperatures of polymers
β Scribed by W. A. Lee; J. H. Sewell
- Publisher
- John Wiley and Sons
- Year
- 1968
- Tongue
- English
- Weight
- 594 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0021-8995
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π SIMILAR VOLUMES
The magnitude of the activation energy for diffusion, ED. is shown to be inversely dependent on the fractional free volume of the polymer above Tg. From the proportionality of ED above and below Tg, the magnitude of El, below T, is also inversely dependent on the free volume in that temperature rang
On the basis of microhardness (H) data measured at room temperature only for a number of polymers in the glassy state, a linear correlation between H and the glass transition temperature T g has been found (H Ο 1.97T g Οͺ 571). By means of this relationship, the deviation of the H values from the add