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Photosensitive copolymer of N-isopropylacrylamide and methacryloyl derivative of spyrobenzopyran

Ivanov, Alexander LU ; Eremeev, NL; Wahlund, Per-Olof LU ; Galaev, Igor LU and Mattiasson, Bo LU (2002) In Polymer 43(13). p.3819-3823
Abstract
The copolymer of N-isopropylacrylamide (NIPAM) and methacryloyl derivative of spirobenzopyran (MSBP) with a molecular weight of 21 000 g/mol and the average molar MSBP content of 1.9% was prepared by free radical polymerization. The copolymer displayed its phase transition in water in the temperature range of 30-50 degreesC. UV irradiation of its aqueous solution caused photoinduced transformation of MSBP units into their coloured merocyanine forms, while the cloud point of the irradiated copolymer shifted by ca. 10 degreesC to lower temperatures. During a long-term exposure to daylight (20 days) the copolymer gradually elapsed to its colourless spiropyran form, the process being ca. 100-times slower than that for monomeric MSBP. Due to... (More)
The copolymer of N-isopropylacrylamide (NIPAM) and methacryloyl derivative of spirobenzopyran (MSBP) with a molecular weight of 21 000 g/mol and the average molar MSBP content of 1.9% was prepared by free radical polymerization. The copolymer displayed its phase transition in water in the temperature range of 30-50 degreesC. UV irradiation of its aqueous solution caused photoinduced transformation of MSBP units into their coloured merocyanine forms, while the cloud point of the irradiated copolymer shifted by ca. 10 degreesC to lower temperatures. During a long-term exposure to daylight (20 days) the copolymer gradually elapsed to its colourless spiropyran form, the process being ca. 100-times slower than that for monomeric MSBP. Due to the slow reverse isomerization of its merocyanine form and low solubility in water at room temperature the UV irradiated copolymer could be quantitatively separated from aqueous solution by centrifugation. (C) 2002 Published by Elsevier Science Ltd. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
photosensitive polymers, N-isopropylacrylamide, spyrobenzopyran
in
Polymer
volume
43
issue
13
pages
3819 - 3823
publisher
Elsevier
external identifiers
  • wos:000175738500028
  • scopus:0037177706
ISSN
0032-3861
DOI
10.1016/S0032-3861(02)00191-X
language
English
LU publication?
yes
id
76ae48a2-2095-4236-a65c-71480f93e57e (old id 336418)
date added to LUP
2007-10-23 11:14:49
date last changed
2017-08-27 05:08:43
@article{76ae48a2-2095-4236-a65c-71480f93e57e,
  abstract     = {The copolymer of N-isopropylacrylamide (NIPAM) and methacryloyl derivative of spirobenzopyran (MSBP) with a molecular weight of 21 000 g/mol and the average molar MSBP content of 1.9% was prepared by free radical polymerization. The copolymer displayed its phase transition in water in the temperature range of 30-50 degreesC. UV irradiation of its aqueous solution caused photoinduced transformation of MSBP units into their coloured merocyanine forms, while the cloud point of the irradiated copolymer shifted by ca. 10 degreesC to lower temperatures. During a long-term exposure to daylight (20 days) the copolymer gradually elapsed to its colourless spiropyran form, the process being ca. 100-times slower than that for monomeric MSBP. Due to the slow reverse isomerization of its merocyanine form and low solubility in water at room temperature the UV irradiated copolymer could be quantitatively separated from aqueous solution by centrifugation. (C) 2002 Published by Elsevier Science Ltd.},
  author       = {Ivanov, Alexander and Eremeev, NL and Wahlund, Per-Olof and Galaev, Igor and Mattiasson, Bo},
  issn         = {0032-3861},
  keyword      = {photosensitive polymers,N-isopropylacrylamide,spyrobenzopyran},
  language     = {eng},
  number       = {13},
  pages        = {3819--3823},
  publisher    = {Elsevier},
  series       = {Polymer},
  title        = {Photosensitive copolymer of N-isopropylacrylamide and methacryloyl derivative of spyrobenzopyran},
  url          = {http://dx.doi.org/10.1016/S0032-3861(02)00191-X},
  volume       = {43},
  year         = {2002},
}