In:
Chinese Journal of Chemical Physics, AIP Publishing, Vol. 21, No. 5 ( 2008-10-01), p. 493-499
Abstract:
Three series of amorphous copolymers containing azobenzene groups with various substituents and certain amounts of crosslinkable acrylic groups were prepared. The cross-linked polymer films were obtained by thermal polymerization of the acrylic groups in the copolymers, during which, by controlling the time of cross-linking reaction, the films can be made with different cross-linking degree (from 0 to 32%, which was monitored by FT-IR spectra measurement). Photo-induced alignment process of the films was performed under irradiation with linearly polarized light at 442 nm, and the effect of cross-linking degree on the photo-induced alignment rate was investigated. The dynamics of the photo-induced alignment was analyzed with biexponential curve fitting. The photo-induced alignment rate and the maximum transmittance of the films decreased because of the cross-linking. Furthermore, for the cross-linked samples, it was found that their saturated value of transmittances keep constant after repeated writing and erasing cycles. The findings reveal that the cross-linking of the film can effectively restrain the phototactic mass transport of azopolymer during irradiation by polarized light. The relationship between the cross-linking degree and the photo-induced alignment behavior of azopolymer is discussed in detail.
Type of Medium:
Online Resource
ISSN:
1674-0068
,
2327-2244
DOI:
10.1088/1674-0068/21/05/493-499
Language:
English
Publisher:
AIP Publishing
Publication Date:
2008
detail.hit.zdb_id:
2381472-X
SSG:
6,25
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