| 摘要 |
<p>Process for enhancement in the mechanical properties of polymeric films prepared from photoconductive polymers, such as poly(N-vinylcarbazole), its homologues and/or its analogues. In this process, polymeric films of these materials are subjected to strain-induced orientation whereby the polymeric chains contained therein are aligned parallel to the lines of force imparted to the film. In order to prevent accompanying deterioration of the charge carrier transport properties of the polymer during such orientation process, the film is subjected to a disordering strain either concurrent with or subsequent to such orientation in order to relax the spatial constraints on their bulky, pendant photoactive groups, and thus relieve them of the distortion imparted during such orientation. Films prepared according to this process have improved flexibility and reduced brittleness, thus making such materials highly suitable for use in flexible electrophotographic imaging members.</p> |
