Rubbing and annealing process

The change in alignment layer crystallinity by the annealing process was evaluated by SEM and FTIR spectroscopy, and the bistability was evaluated by the response of the memory state to small disturbing electric fields. Three kinds of layers, S, A and C, were produced. The layer S was produced by the usual process, that is, a methanol/7re-cresol solution of nylon 6,6 was dried at 160 °C for 1.5 h in a 

By observing the surfaces using SEM, a clear difference in the number of spherulites, suggesting a difference in crystallinity, could be observed. In the case of layer A, the number of spherulites was either small or almost no spherulites could be observed showing that layer A was as amorphous. On the contrary, in the case of layer C, many spherulites could be observed, which means that layer C possesses a high degree of crystallinity. The crystallinity of the nylon 6,6 was also evaluated by FTIR spectroscopy [25]. The results showed that the crystallinity increased in the order of A, S and C. The percentages of crystallization were 43.5%, 45.7% and 50.8% for A, S and C, respectively. 

O 2005 KohkiTakatoh, Masald Hasegawa, Mitsuhiro Koden, Nobi oiki Itoh, Ray Has wa and Masanod Sakamoto 

This phenomenon is explained as follows. For amorphous polymers, no energy barrier exists between the different memory states. On the other hand, crystalline polymers show good bistability Stroboscopic micrographs of SSFLC switching show that after the first switched domains, or the cores, are formed, they grow into larger areas. The switched areas become the seeds for the switching of 

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