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Ota S, Harada M. Thermal conductivity enhancement of liquid crystalline epoxy/
MgO
composites by formation of highly ordered network structure. J Appl Polym Sci 2021. [DOI: 10.1002/app.50367] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Saki Ota
- Faculty of Chemistry, Materials and Bioengineering Kansai University Osaka Japan
| | - Miyuki Harada
- Faculty of Chemistry, Materials and Bioengineering Kansai University Osaka Japan
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Harada M, Okamoto N, Ochi M. Influence of the introduction of flexible alkyl chains on the thermal behavior and mechanical properties of mesogenic epoxy thermosets. J Appl Polym Sci 2016. [DOI: 10.1002/app.44244] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Miyuki Harada
- Faculty of Chemistry, Materials and Bioengineering; Kansai University; Suita-shi Osaka 564-8680 Japan
| | - Naoki Okamoto
- Faculty of Chemistry, Materials and Bioengineering; Kansai University; Suita-shi Osaka 564-8680 Japan
| | - Mitsukazu Ochi
- Faculty of Chemistry, Materials and Bioengineering; Kansai University; Suita-shi Osaka 564-8680 Japan
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Mossety-Leszczak B, Strachota B, Strachota A, Steinhart M, Šlouf M. The orientation-enhancing effect of diphenyl aluminium phosphate nanorods in a liquid-crystalline epoxy matrix ordered by magnetic field. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.09.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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4
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Zhou D, Lu M, Liang L, Shen T, Xiao W. Curing behavior of Azo-containing twin liquid crystalline epoxy resins with anhydride. POLYM ENG SCI 2012. [DOI: 10.1002/pen.22073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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5
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Zhou DW, Liang LY, Lu MG. Dimeric liquid crystalline thermosets from azo-containing diglycidyl ether cured by anhydride. Polym Bull (Berl) 2010. [DOI: 10.1007/s00289-010-0401-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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González L, Ramis X, Salla JM, Mantecón A, Serra A. Anionic copolymerization of diglycidyl ether of bisphenol A with Meldrum's acid derivatives initiated by 4-(N,N-dimethylamino) pyridine. J Appl Polym Sci 2009. [DOI: 10.1002/app.29211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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7
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Harada M, Sumitomo K, Nishimoto Y, Ochi M. Relationship between fracture toughness and domain size of liquid-crystalline epoxy resins having polydomain structure. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/polb.21626] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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8
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Meng FB, Jiao Lian, Chen HB, Gao YM, Zhang BY. Cholesteric Liquid-Crystalline Thermosets Derived from Side-Chain Liquid-Crystalline Epoxy Oligomers. HIGH PERFORM POLYM 2008. [DOI: 10.1177/0954008307086682] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A series of side-chain liquid crystalline (LC) oligomers bearing glycidyl ether groups were synthesized with cholest-5-en-3-ol(3 β)-4-(2-propenyloxy) benzoate, octyl 4-(4-allyloxy-benzoyloxy)-benzoate and epoxy monomer allyl glycidyl ether. The chemical structures and LC properties of the monomers and oligomers were characterized by use of various experimental techniques. All the chiral LC oligomers showed cholesteric mesophase with very wide mesophase temperature ranges. All the synthesized LC oligomers were cured with 4,4'-diaminodiphenylmethane at the same curing conditions. The thermal behaviors, mesomorphic phase and optical properties of the thermosets were characterized. The synthesized thermosets have high thermal stability. The cholesteric phases of LC oligomers were frozen in the polymer networks. Compared with those of corresponding oligomers, the reflection located at wide angles of thermosets became more diffuse, and the peak intensity decreased in X-ray diffraction analysis. The selective light reflection maximum λmax of the thermosets at room temperature shifted slightly to short wavelengths as the LC monomer bearing cholesteryl component was increased, indicating that the helical pitch P becomes shorter due to more chiral groups in the polymer network systems. The temperature dependences of both reflection wavelength and optical rotation under the influence of the crosslinking reaction were also investigated.
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Affiliation(s)
- Fan-Bao Meng
- Research Centre for Molecular Science and Engineering, Northeastern University, Shenyang, 110004, China
| | - Jiao Lian
- Research Centre for Molecular Science and Engineering, Northeastern University, Shenyang, 110004, China
| | - Hai-Bin Chen
- Research Centre for Molecular Science and Engineering, Northeastern University, Shenyang, 110004, China
| | - Yong-Mei Gao
- Research Centre for Molecular Science and Engineering, Northeastern University, Shenyang, 110004, China
| | - Bao-Yan Zhang
- Research Centre for Molecular Science and Engineering, Northeastern University, Shenyang, 110004, China,
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Zhang X, Chen S, Chen T, Sun X, Liu F, Qi G. Synthesis of a soluble azomethine-containing bisphenol and the properties of its modified epoxy thermosets. J Appl Polym Sci 2007. [DOI: 10.1002/app.26712] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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10
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Cervellera R, Ramis X, Salla JM, Mantecón A, Serra A. N,N-dimethylaminopyridine as initiator in the copolymerization of diglycidylether of bisphenol A with six-membered cyclic carbonates. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21393] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Harada M, Watanabe Y, Tanaka Y, Ochi M. Thermal properties and fracture toughness of a liquid-crystalline epoxy resin cured with an aromatic diamine crosslinker having a mesogenic group. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/polb.20916] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Castell P, Serra A, Galià M. Liquid-crystalline thermosets from liquid-crystalline epoxy resins containing bisazomethinebiphenylene mesogens in the central core: Copolymerization with a nonmesomorphic epoxy resin. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pola.20254] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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Harada M, Ochi M, Tobita M, Kimura T, Ishigaki T, Shimoyama N, Aoki H. Thermomechanical properties of liquid-crystalline epoxy networks arranged by a magnetic field. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/polb.10740] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ribera D, Serra A, Mantecón A. Liquid-crystalline thermosets by the curing of dimeric liquid-crystalline epoxyimine monomers with 2,4-toluene diisocyanate. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/pola.10794] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ribera D, Serra A, Mantecón A. New dimeric LC-epoxyimine monomers with oxyethylene central spacers. Crosslinking study. POLYMER 2003. [DOI: 10.1016/s0032-3861(03)00174-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Ribera D, Mantecón A, Serra A. Synthesis and crosslinking of a series of dimeric liquid-crystalline diglycidylester compounds containing imine groups. ACTA ACUST UNITED AC 2002. [DOI: 10.1002/pola.10510] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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