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Zhang L, Li H, Zhao K, Zhang T, Liu D, Wang S, Wu F, Zhang Q, Han Y. Improving crystallinity and ordering of PBTTT by inhibiting nematic to smectic phase transition via rapid cooling. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Park GT, Chang JH, Lim AR. Thermotropic Liquid Crystalline Polymers with Various Alkoxy Side Groups: Thermal Properties and Molecular Dynamics. Polymers (Basel) 2019; 11:E992. [PMID: 31167444 PMCID: PMC6630353 DOI: 10.3390/polym11060992] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 05/24/2019] [Accepted: 06/01/2019] [Indexed: 11/16/2022] Open
Abstract
Two series of thermotropic liquid-crystalline polymers (TLCPs) were synthesized by reacting various dialkoxy terephthalate units with hydroquinone (HQ) and 2,6-naphthalene diol (Naph). The dialkoxy terephthalate moieties used in this study include 2,5-diethoxyterephthalate, 2,5-dibutoxyterephthalate, and 2,5-dihexyloxy-terephthalate. All the TLCPs synthesized in this study formed nematic phases. The molecular motions according to the length of the dialkoxy side groups in the TLCPs were evaluated by 13C cross-polarization/magic angle spinning nuclear magnetic resonance spectroscopy. The thermal properties and molecular dynamics of the TLCPs are found to be affected by the length of the dialkoxy side group and the aromatic diol unit in the main chain. Further, the thermal behaviors, liquid crystalline mesophases, and degree of crystallinity of the two series of TLCPs, i.e., HQ- and Naph-TLCPs, are compared.
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Affiliation(s)
- Gi Tae Park
- Department of Polymer Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea.
| | - Jin-Hae Chang
- Department of Polymer Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea.
| | - Ae Ran Lim
- Analytical Laboratory of Advanced Ferroelectric Crystals, Jeonju University, Jeonju 55069, Korea.
- Department of Science Education, Jeonju University, Jeonju 55069, Korea.
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Park JR, Cho KY, Bang MS. Synthesis and Properties of Liquid Crystalline Polyesters with X-shaped Mesogenic Group in Main Chain. APPLIED CHEMISTRY FOR ENGINEERING 2014. [DOI: 10.14478/ace.2013.1101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Synthesis and Properties of Semi-flexible Liquid Crystalline Polyesters with Rigid Lateral Group. ELASTOMERS AND COMPOSITES 2013. [DOI: 10.7473/ec.2013.48.4.306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Shockravi A, Abouzari-Lotf E, Javadi A. Synthesis and Properties of Organosoluble Fluorinated Polyamides Bearing 2-2′-Thio-bis(4-methyl Phenoxy) Groups. Des Monomers Polym 2012. [DOI: 10.1163/156855509x412063] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Abbas Shockravi
- a Faculty of Chemistry, Tarbiat Moallem University, Mofatteh Ave. No. 49, Postal Code 15614, Tehran, Iran; or ,
| | - Ebrahim Abouzari-Lotf
- b Faculty of Chemistry, Tarbiat Moallem University, Mofatteh Ave. No. 49, Postal Code 15614, Tehran, Iran, Young Researcher Club of Iran, Islamic Azad University, P.O. Box 15655, Tehran, Iran
| | - Ali Javadi
- c Faculty of Chemistry, Tarbiat Moallem University, Mofatteh Ave. No. 49, Postal Code 15614, Tehran, Iran
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Balaji K, Murugavel SC. Synthesis, spectral, and thermal characterization of photosensitive poly(ether-ester)s containing α,β-unsaturated ketone moieties in the main chain derived from 2,6-bis[4-(3-hydroxypropyloxy)-3-methoxybenzylidene]cyclohexanone. J Appl Polym Sci 2011. [DOI: 10.1002/app.33335] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Bagheri M, Rad RZ. Synthesis and characterization of thermotropic liquid crystalline polyesters with biphenyl unit in the main chain. REACT FUNCT POLYM 2008. [DOI: 10.1016/j.reactfunctpolym.2007.10.029] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Bagheri M, Didehban K, Entezami AA. Thermotropic polyesters. 2: Synthesis, characterization and thermal transitions of copolyesters containing 4,4′-bis (ω-alkyloxy) biphenyl isophthalate units. Eur Polym J 2005. [DOI: 10.1016/j.eurpolymj.2004.10.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Vijayanathan V, Prasad VS, Pillai CKS. Synthesis and thermal behavior of thermotropic terpolymers based on 8-(3-hydroxyphenyl)octanoic acid, 2,6-naphthalenedicarboxylic acid, and substituted hydroquinones. J Appl Polym Sci 2001. [DOI: 10.1002/app.1936] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Affiliation(s)
- D. Dollimore
- Department of Chemistry and College of Pharmacy, The University of Toledo, Toledo, Ohio 43606
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Bhowmik PK, Atkins EDT, Lenz RW, Han H. Crystalline and Liquid Crystalline Polyesters of Phenyl-Substituted 4,4‘-Biphenols and 1,1‘-Binaphthyl-4,4‘-diol. 3. Copolymers with 6-Hydroxy-2-naphthoic Acid. Macromolecules 1996. [DOI: 10.1021/ma951330k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pradip K. Bhowmik
- Department of Chemistry, University of Detroit Mercy, 4001 West McNichols Road, P.O. Box 19900, Detroit, Michigan 48219-0900, H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K., and Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
| | - Edward D. T. Atkins
- Department of Chemistry, University of Detroit Mercy, 4001 West McNichols Road, P.O. Box 19900, Detroit, Michigan 48219-0900, H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K., and Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
| | - Robert W. Lenz
- Department of Chemistry, University of Detroit Mercy, 4001 West McNichols Road, P.O. Box 19900, Detroit, Michigan 48219-0900, H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K., and Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
| | - Haesook Han
- Department of Chemistry, University of Detroit Mercy, 4001 West McNichols Road, P.O. Box 19900, Detroit, Michigan 48219-0900, H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K., and Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
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