Poly(N-vinylimidazole) based hydrogen bonded side chain liquid crystalline polymer

Yeşim H. Gursel; Bahire Filiz Senkal; Mehmet Kandaz; Fahrettin Yakuphanoglu

doi:10.1002/pat.1848

Poly(N-vinylimidazole) based hydrogen bonded side chain liquid crystalline polymer

Yeşim H. Gursel, Bahire Filiz Senkal, Mehmet Kandaz, Fahrettin Yakuphanoglu^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

A new poly(N-vinylimidazole) (PVI) based side chain liquid crystalline polymer (HB-PLC) was prepared from PVI as a hydrogen bond acceptor polymer and 11-(4-cyanobiphenyl-4'-oxy)undekan-1-ol (LC11) by molecular self-assembly processes via hydrogen bond formation between nitrogen of PVI and hydroxyl group of the LC11. The formation of H-bond was confirmed by using FTIR spectroscopy. The liquid crystalline behavior of the HB-PLC was investigated by differential scanning calorimeter (DSC) and polarized optical microscopy. The thermal behaviors of the H-bonded liquid crystalline polymer were investigated by DSC measurements under various heating rates. The HB-PLC shows a transition temperature of 97°C with an relatively high enthalpy change of 140.6 J/g corresponding to the transition from liquid crystalline nematic phase to isotropic phase. The activation energy required for liquid crystal phase transformation was found to be 551.75 kJ/mol.

Original language	English
Pages (from-to)	90-93
Number of pages	4
Journal	Polymers for Advanced Technologies
Volume	22
Issue number	1
DOIs	https://doi.org/10.1002/pat.1848
Publication status	Published - Jan 2011

Keywords

Hydrogen bonding
Liquid crystalline polymers
Poly(N-vinylimidazole)

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10.1002/pat.1848

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title = "Poly(N-vinylimidazole) based hydrogen bonded side chain liquid crystalline polymer",

abstract = "A new poly(N-vinylimidazole) (PVI) based side chain liquid crystalline polymer (HB-PLC) was prepared from PVI as a hydrogen bond acceptor polymer and 11-(4-cyanobiphenyl-4'-oxy)undekan-1-ol (LC11) by molecular self-assembly processes via hydrogen bond formation between nitrogen of PVI and hydroxyl group of the LC11. The formation of H-bond was confirmed by using FTIR spectroscopy. The liquid crystalline behavior of the HB-PLC was investigated by differential scanning calorimeter (DSC) and polarized optical microscopy. The thermal behaviors of the H-bonded liquid crystalline polymer were investigated by DSC measurements under various heating rates. The HB-PLC shows a transition temperature of 97°C with an relatively high enthalpy change of 140.6 J/g corresponding to the transition from liquid crystalline nematic phase to isotropic phase. The activation energy required for liquid crystal phase transformation was found to be 551.75 kJ/mol.",

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author = "Gursel, {Ye{\c s}im H.} and Senkal, {Bahire Filiz} and Mehmet Kandaz and Fahrettin Yakuphanoglu",

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T1 - Poly(N-vinylimidazole) based hydrogen bonded side chain liquid crystalline polymer

AU - Gursel, Yeşim H.

AU - Senkal, Bahire Filiz

AU - Kandaz, Mehmet

AU - Yakuphanoglu, Fahrettin

PY - 2011/1

Y1 - 2011/1

N2 - A new poly(N-vinylimidazole) (PVI) based side chain liquid crystalline polymer (HB-PLC) was prepared from PVI as a hydrogen bond acceptor polymer and 11-(4-cyanobiphenyl-4'-oxy)undekan-1-ol (LC11) by molecular self-assembly processes via hydrogen bond formation between nitrogen of PVI and hydroxyl group of the LC11. The formation of H-bond was confirmed by using FTIR spectroscopy. The liquid crystalline behavior of the HB-PLC was investigated by differential scanning calorimeter (DSC) and polarized optical microscopy. The thermal behaviors of the H-bonded liquid crystalline polymer were investigated by DSC measurements under various heating rates. The HB-PLC shows a transition temperature of 97°C with an relatively high enthalpy change of 140.6 J/g corresponding to the transition from liquid crystalline nematic phase to isotropic phase. The activation energy required for liquid crystal phase transformation was found to be 551.75 kJ/mol.

AB - A new poly(N-vinylimidazole) (PVI) based side chain liquid crystalline polymer (HB-PLC) was prepared from PVI as a hydrogen bond acceptor polymer and 11-(4-cyanobiphenyl-4'-oxy)undekan-1-ol (LC11) by molecular self-assembly processes via hydrogen bond formation between nitrogen of PVI and hydroxyl group of the LC11. The formation of H-bond was confirmed by using FTIR spectroscopy. The liquid crystalline behavior of the HB-PLC was investigated by differential scanning calorimeter (DSC) and polarized optical microscopy. The thermal behaviors of the H-bonded liquid crystalline polymer were investigated by DSC measurements under various heating rates. The HB-PLC shows a transition temperature of 97°C with an relatively high enthalpy change of 140.6 J/g corresponding to the transition from liquid crystalline nematic phase to isotropic phase. The activation energy required for liquid crystal phase transformation was found to be 551.75 kJ/mol.

KW - Hydrogen bonding

KW - Liquid crystalline polymers

KW - Poly(N-vinylimidazole)

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Poly(N-vinylimidazole) based hydrogen bonded side chain liquid crystalline polymer

Abstract

Keywords

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