Synthesis and characterization of poly (l-lactic acid) containing the azobenzene mesogens

Run Tao Dong, Qing Bin Xue, Ling Min Sun, Quanxuan Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A series of azobenzene containing group Poly (L-lactic acid) (PLLA) were synthesized by Ring-Opening Polymerization of L-lactide (L-LA) catalysted by Sn(Oct) 2 initiated by alcohol-OH containing the azobenzene chromophores. Their molecular weights were well controlled by the feed ratio as characterized by Gel Permeation Chromatography (GPC) and 1H NMR Spectrometry and agreed well with theoretical values. The thermal properties and liquid crystal phases were investigated by Differential Scanning Calorimetry (DSC), polarized optical microscopy (POM) and X-ray Diffraction (XRS) measurements. Cis-trans photoisomerization behavior of the polymers in the solutions and the films were studied with UV irradiation. By the Circular Dichroism Spectroscopy (CD) characterization of the solutions and films of the polymer, the PLLA segments show huge optical rotation power in helical structure.

Original languageEnglish (US)
Title of host publicationLiquid Crystals and Related Materials II
PublisherTrans Tech Publications Ltd
Pages185-188
Number of pages4
ISBN (Print)9783037852934
DOIs
StatePublished - Jan 1 2012
Event2nd International Symposium on Liquid Crystals: Science and Technology, LCST2011 - Changzhou, China
Duration: Jul 17 2011Jul 19 2011

Publication series

NameSolid State Phenomena
Volume181-182
ISSN (Print)1012-0394

Other

Other2nd International Symposium on Liquid Crystals: Science and Technology, LCST2011
CountryChina
CityChangzhou
Period7/17/117/19/11

Fingerprint

lactic acid
Azobenzene
Lactic acid
Lactic Acid
Polymers
Optical rotation
Circular dichroism spectroscopy
Photoisomerization
Liquid Crystals
gel chromatography
Ring opening polymerization
polymers
Gel permeation chromatography
synthesis
Chromophores
Liquid crystals
Spectrometry
spectroscopy
chromophores
dichroism

Keywords

  • Azobenzene
  • Poly (L-lactic acid)
  • Thermal properties

Cite this

Dong, R. T., Xue, Q. B., Sun, L. M., & Zhang, Q. (2012). Synthesis and characterization of poly (l-lactic acid) containing the azobenzene mesogens. In Liquid Crystals and Related Materials II (pp. 185-188). (Solid State Phenomena; Vol. 181-182). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/SSP.181-182.185

Synthesis and characterization of poly (l-lactic acid) containing the azobenzene mesogens. / Dong, Run Tao; Xue, Qing Bin; Sun, Ling Min; Zhang, Quanxuan.

Liquid Crystals and Related Materials II. Trans Tech Publications Ltd, 2012. p. 185-188 (Solid State Phenomena; Vol. 181-182).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Dong, RT, Xue, QB, Sun, LM & Zhang, Q 2012, Synthesis and characterization of poly (l-lactic acid) containing the azobenzene mesogens. in Liquid Crystals and Related Materials II. Solid State Phenomena, vol. 181-182, Trans Tech Publications Ltd, pp. 185-188, 2nd International Symposium on Liquid Crystals: Science and Technology, LCST2011, Changzhou, China, 7/17/11. https://doi.org/10.4028/www.scientific.net/SSP.181-182.185
Dong RT, Xue QB, Sun LM, Zhang Q. Synthesis and characterization of poly (l-lactic acid) containing the azobenzene mesogens. In Liquid Crystals and Related Materials II. Trans Tech Publications Ltd. 2012. p. 185-188. (Solid State Phenomena). https://doi.org/10.4028/www.scientific.net/SSP.181-182.185
Dong, Run Tao ; Xue, Qing Bin ; Sun, Ling Min ; Zhang, Quanxuan. / Synthesis and characterization of poly (l-lactic acid) containing the azobenzene mesogens. Liquid Crystals and Related Materials II. Trans Tech Publications Ltd, 2012. pp. 185-188 (Solid State Phenomena).
@inproceedings{e0a41b1b1ab04134adb2d9eb70237aa1,
title = "Synthesis and characterization of poly (l-lactic acid) containing the azobenzene mesogens",
abstract = "A series of azobenzene containing group Poly (L-lactic acid) (PLLA) were synthesized by Ring-Opening Polymerization of L-lactide (L-LA) catalysted by Sn(Oct) 2 initiated by alcohol-OH containing the azobenzene chromophores. Their molecular weights were well controlled by the feed ratio as characterized by Gel Permeation Chromatography (GPC) and 1H NMR Spectrometry and agreed well with theoretical values. The thermal properties and liquid crystal phases were investigated by Differential Scanning Calorimetry (DSC), polarized optical microscopy (POM) and X-ray Diffraction (XRS) measurements. Cis-trans photoisomerization behavior of the polymers in the solutions and the films were studied with UV irradiation. By the Circular Dichroism Spectroscopy (CD) characterization of the solutions and films of the polymer, the PLLA segments show huge optical rotation power in helical structure.",
keywords = "Azobenzene, Poly (L-lactic acid), Thermal properties",
author = "Dong, {Run Tao} and Xue, {Qing Bin} and Sun, {Ling Min} and Quanxuan Zhang",
year = "2012",
month = "1",
day = "1",
doi = "10.4028/www.scientific.net/SSP.181-182.185",
language = "English (US)",
isbn = "9783037852934",
series = "Solid State Phenomena",
publisher = "Trans Tech Publications Ltd",
pages = "185--188",
booktitle = "Liquid Crystals and Related Materials II",

}

TY - GEN

T1 - Synthesis and characterization of poly (l-lactic acid) containing the azobenzene mesogens

AU - Dong, Run Tao

AU - Xue, Qing Bin

AU - Sun, Ling Min

AU - Zhang, Quanxuan

PY - 2012/1/1

Y1 - 2012/1/1

N2 - A series of azobenzene containing group Poly (L-lactic acid) (PLLA) were synthesized by Ring-Opening Polymerization of L-lactide (L-LA) catalysted by Sn(Oct) 2 initiated by alcohol-OH containing the azobenzene chromophores. Their molecular weights were well controlled by the feed ratio as characterized by Gel Permeation Chromatography (GPC) and 1H NMR Spectrometry and agreed well with theoretical values. The thermal properties and liquid crystal phases were investigated by Differential Scanning Calorimetry (DSC), polarized optical microscopy (POM) and X-ray Diffraction (XRS) measurements. Cis-trans photoisomerization behavior of the polymers in the solutions and the films were studied with UV irradiation. By the Circular Dichroism Spectroscopy (CD) characterization of the solutions and films of the polymer, the PLLA segments show huge optical rotation power in helical structure.

AB - A series of azobenzene containing group Poly (L-lactic acid) (PLLA) were synthesized by Ring-Opening Polymerization of L-lactide (L-LA) catalysted by Sn(Oct) 2 initiated by alcohol-OH containing the azobenzene chromophores. Their molecular weights were well controlled by the feed ratio as characterized by Gel Permeation Chromatography (GPC) and 1H NMR Spectrometry and agreed well with theoretical values. The thermal properties and liquid crystal phases were investigated by Differential Scanning Calorimetry (DSC), polarized optical microscopy (POM) and X-ray Diffraction (XRS) measurements. Cis-trans photoisomerization behavior of the polymers in the solutions and the films were studied with UV irradiation. By the Circular Dichroism Spectroscopy (CD) characterization of the solutions and films of the polymer, the PLLA segments show huge optical rotation power in helical structure.

KW - Azobenzene

KW - Poly (L-lactic acid)

KW - Thermal properties

UR - http://www.scopus.com/inward/record.url?scp=82355177237&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=82355177237&partnerID=8YFLogxK

U2 - 10.4028/www.scientific.net/SSP.181-182.185

DO - 10.4028/www.scientific.net/SSP.181-182.185

M3 - Conference contribution

SN - 9783037852934

T3 - Solid State Phenomena

SP - 185

EP - 188

BT - Liquid Crystals and Related Materials II

PB - Trans Tech Publications Ltd

ER -