PHOTORESPONSIVE BEHAVIOR OF AZOBENZENE-BASED (METH)ACRYLIC (CO)POLYMERS IN THIN-FILMS

trans isomerization rates could be obtained by varying the substituent, spacer, and copolymer composition. The liquid crystalline (LC) polymers showed an interesting behavior of the orientation of the stable trans state when exposed to visible light, during which the orientation of the Az.b. groups changed from more or less random to more perpendicular (photoselection process). This change of orientation of the Az.b. groups may be suitable for optical data storage. In principle, the orientation change is permanent, but it can be easily erased by heating the LC polymer above its isotropization temperature, on which the original random orientation is largely restored. -->
Jazyk: English
ISSN: 0024-9297
Přístupová URL adresa: https://explore.openaire.eu/search/publication?articleId=narcis______::0780d37b7f1ecaeed97c759a7dc7fbb3
https://research.rug.nl/en/publications/068382fc-3642-4d6c-b7d5-b8b2750ef85b
Rights: RESTRICTED
Přírůstkové číslo: edsair.narcis........0780d37b7f1ecaeed97c759a7dc7fbb3
Autor: HAITJEMA, HJ, VONMORGEN, GL, TAN, YY, CHALLA, G
Přispěvatelé: Polymer Chemistry and Bioengineering
Jazyk: angličtina
Rok vydání: 1994
Předmět:
Zdroj: Macromolecules, 27(21), 6201-6206. AMER CHEMICAL SOC
ISSN: 0024-9297
Popis: The reversible photoisomerization and the thermal isomerization of azobenzene-based (Az.b.) groups covalently bound to (meth)acrylic (co)polymers were investigated in thin films. For the amorphous polymers it was found that a broad range of the thermal cis --> trans isomerization rates could be obtained by varying the substituent, spacer, and copolymer composition. The liquid crystalline (LC) polymers showed an interesting behavior of the orientation of the stable trans state when exposed to visible light, during which the orientation of the Az.b. groups changed from more or less random to more perpendicular (photoselection process). This change of orientation of the Az.b. groups may be suitable for optical data storage. In principle, the orientation change is permanent, but it can be easily erased by heating the LC polymer above its isotropization temperature, on which the original random orientation is largely restored.
Databáze: OpenAIRE
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