dc.contributor.author |
Reddy, GSM
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dc.contributor.author |
Narasimhaswamy, T
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dc.contributor.author |
Ray, Suprakas S
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dc.contributor.author |
Raju, KM
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dc.date.accessioned |
2019-05-07T06:25:35Z |
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dc.date.available |
2019-05-07T06:25:35Z |
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dc.date.issued |
2018-06 |
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dc.identifier.citation |
Reddy, G.S.M., Narasimhaswamy, T., Ray, S.S. & Raju, K.M. 2018. Synthesis and mesophase characterization of methacrylate based three phenyl ring core side chain liquid crystalline copolymers. Journal of Molecular Liquids, Vol 259, pp. 416-423 |
en_US |
dc.identifier.issn |
0167-7322 |
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dc.identifier.issn |
1873-3166 |
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dc.identifier.uri |
https://doi.org/10.1016/j.molliq.2018.03.036
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|
dc.identifier.uri |
https://www.sciencedirect.com/science/article/pii/S0167732217360762?via%3Dihub
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dc.identifier.uri |
http://hdl.handle.net/10204/10979
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dc.description |
Copyright: 2018 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract version of the full-text item. For access to the full-text item, please consult the publisher's website. The definitive version of the work is published in Journal of Molecular Liquids, Vol 259, pp. 416-423 |
en_US |
dc.description.abstract |
A new series of side chain liquid crystalline copolymers consisting of a mesogenic monomer and a nonmesogenic n-butyl methacrylate are prepared by free radical solution polymerization. The mesogenic monomer is synthesized by a multistep route and is built with side arm core consisting of three phenyl rings linked by an ester and a terminal alkoxy chain at one end and hexamethylene spacer between methacyrlate unit and the phenyl ring core. The copolymers are synthesizedwith different feed ratios of liquid crystallinemonomer and n-butyl methacrylate to realize composition dependent copolymers. The mesogenic monomers are characterized by FTIR, (sup)1H and (sup)13C NMR while for a representative mesogen solution two-dimensional (2D) NMR experiments are also carried out. The hot-stage optical polarized microscopy, differential scanning calorimetry and variable temperature powder X-ray diffraction investigations revealed the existence of enantiotropic nematic (N) and smectic C (SC) mesophases for the copolymers. The weight average and number average molecular weight of the copolymers are found to be in the range 1.6 × 10(sup)4 to 3.7 × 10(sup)4 g/mol from gel permeation chromatography. Thermal degradation profile of mesogenic copolymers investigated by thermogravimetric analysis revealed that the copolymers are stable till 335 °C in nitrogen atmosphere. The copolymer compositions were determined using 1H NMR analysis. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Elsevier |
en_US |
dc.relation.ispartofseries |
Workflow;22037 |
|
dc.subject |
Copolymers |
en_US |
dc.subject |
Phenyl ring |
en_US |
dc.subject |
Liquid crystalline |
en_US |
dc.title |
Synthesis and mesophase characterization of methacrylate based three phenyl ring core side chain liquid crystalline copolymers |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Reddy, G., Narasimhaswamy, T., Ray, S. S., & Raju, K. (2018). Synthesis and mesophase characterization of methacrylate based three phenyl ring core side chain liquid crystalline copolymers. http://hdl.handle.net/10204/10979 |
en_ZA |
dc.identifier.chicagocitation |
Reddy, GSM, T Narasimhaswamy, Suprakas S Ray, and KM Raju "Synthesis and mesophase characterization of methacrylate based three phenyl ring core side chain liquid crystalline copolymers." (2018) http://hdl.handle.net/10204/10979 |
en_ZA |
dc.identifier.vancouvercitation |
Reddy G, Narasimhaswamy T, Ray SS, Raju K. Synthesis and mesophase characterization of methacrylate based three phenyl ring core side chain liquid crystalline copolymers. 2018; http://hdl.handle.net/10204/10979. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Reddy, GSM
AU - Narasimhaswamy, T
AU - Ray, Suprakas S
AU - Raju, KM
AB - A new series of side chain liquid crystalline copolymers consisting of a mesogenic monomer and a nonmesogenic n-butyl methacrylate are prepared by free radical solution polymerization. The mesogenic monomer is synthesized by a multistep route and is built with side arm core consisting of three phenyl rings linked by an ester and a terminal alkoxy chain at one end and hexamethylene spacer between methacyrlate unit and the phenyl ring core. The copolymers are synthesizedwith different feed ratios of liquid crystallinemonomer and n-butyl methacrylate to realize composition dependent copolymers. The mesogenic monomers are characterized by FTIR, (sup)1H and (sup)13C NMR while for a representative mesogen solution two-dimensional (2D) NMR experiments are also carried out. The hot-stage optical polarized microscopy, differential scanning calorimetry and variable temperature powder X-ray diffraction investigations revealed the existence of enantiotropic nematic (N) and smectic C (SC) mesophases for the copolymers. The weight average and number average molecular weight of the copolymers are found to be in the range 1.6 × 10(sup)4 to 3.7 × 10(sup)4 g/mol from gel permeation chromatography. Thermal degradation profile of mesogenic copolymers investigated by thermogravimetric analysis revealed that the copolymers are stable till 335 °C in nitrogen atmosphere. The copolymer compositions were determined using 1H NMR analysis.
DA - 2018-06
DB - ResearchSpace
DP - CSIR
KW - Copolymers
KW - Phenyl ring
KW - Liquid crystalline
LK - https://researchspace.csir.co.za
PY - 2018
SM - 0167-7322
SM - 1873-3166
T1 - Synthesis and mesophase characterization of methacrylate based three phenyl ring core side chain liquid crystalline copolymers
TI - Synthesis and mesophase characterization of methacrylate based three phenyl ring core side chain liquid crystalline copolymers
UR - http://hdl.handle.net/10204/10979
ER -
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en_ZA |