KFU. Card publication. Effect of secondary relaxation transitions on photo-induced anisotropy in glassy azobenzene-functionalized polymers

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FEDERAL UNIVERSITY

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EFFECT OF SECONDARY RELAXATION TRANSITIONS ON PHOTO-INDUCED ANISOTROPY IN GLASSY AZOBENZENE-FUNCTIONALIZED POLYMERS

Form of presentation

Articles in international journals and collections

Year of publication

2017

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Authors, employees of KFU

Saykin Semen Konstantinovich, author

Shukhina Kseniya Leonidovna, author

Bibliographic description in the original language

Kharinsev S.S. Effect of secondary relaxation transitions on photo-induced anisotropy in glassy azobenzene-functionalized polymers / S.S.Kharinsev, K.L.Shukhina, A.I.Fishman, S.K.Saikin //J. Mater. Chem. C, 2017 (DOI: 10.1039/C7TC01652B)

Annotation

We propose a physical mechanism for a photo-induced orientation alignment of azo-dyes incorporated in polymers at temperatures far below the glass transition temperature. Using polarized FT-IR spectroscopy, we show that optical dichroism undergoes an observable change at the β-relaxation transition of azo-polymer when the mobility of short backbone fragments is increased. We explain this effect using temperature-dependent local strains that occur within the polymer backbones in a glassy state. These strains underlie the enhanced thermal relaxation that drives the orientation kinetics.

Keywords

photo-induced orientation, glass transition, relaxation transition, thermal relaxation

The name of the journal

Journal of Materials Chemistry C

URL

http://pubs.rsc.org/en/content/articlelanding/2014/tc/c7tc01652b#!divAbstract

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=159200&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Saykin Semen Konstantinovich	ru_RU
dc.contributor.author	Shukhina Kseniya Leonidovna	ru_RU
dc.date.accessioned	2017-01-01T00:00:00Z	ru_RU
dc.date.available	2017-01-01T00:00:00Z	ru_RU
dc.date.issued	2017	ru_RU
dc.identifier.citation	Kharinsev S.S. Effect of secondary relaxation transitions on photo-induced anisotropy in glassy azobenzene-functionalized polymers / S.S.Kharinsev, K.L.Shukhina, A.I.Fishman, S.K.Saikin //J. Mater. Chem. C, 2017 (DOI: 10.1039/C7TC01652B)	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=159200&p_lang=2	ru_RU
dc.description.abstract	Journal of Materials Chemistry C	ru_RU
dc.description.abstract	We propose a physical mechanism for a photo-induced orientation alignment of azo-dyes incorporated in polymers at temperatures far below the glass transition temperature. Using polarized FT-IR spectroscopy, we show that optical dichroism undergoes an observable change at the β-relaxation transition of azo-polymer when the mobility of short backbone fragments is increased. We explain this effect using temperature-dependent local strains that occur within the polymer backbones in a glassy state. These strains underlie the enhanced thermal relaxation that drives the orientation kinetics.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	photo-induced orientation	ru_RU
dc.subject	glass transition	ru_RU
dc.subject	relaxation transition	ru_RU
dc.subject	thermal relaxation	ru_RU
dc.title	Effect of secondary relaxation transitions on photo-induced anisotropy in glassy azobenzene-functionalized polymers	ru_RU
dc.type	Articles in international journals and collections	ru_RU