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Hossain MM, Olamilekan AI, Jeong HO, Lim H, Kim YK, Cho H, Jeong HD, Islam MA, Goh M, You NH, Kim MJ, Choi SQ, Hahn JR, Yeo H, Jang SG. Diacetylene-Containing Dual-Functional Liquid Crystal Epoxy Resin: Strategic Phase Control for Topochemical Polymerization of Diacetylenes and Thermal Conductivity Enhancement. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00436] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Md. Monir Hossain
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
- Department of Chemistry, Department of Bioactive Material Sciences, and Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Arinola Isa Olamilekan
- Department of Science Education, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Hyun-Oh Jeong
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
| | - Hongjin Lim
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
| | - Young-Kyeong Kim
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Hyunjin Cho
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
| | - Hyeon Dam Jeong
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
| | - Md. Akherul Islam
- Department of Chemistry, Department of Bioactive Material Sciences, and Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Munju Goh
- Department of Chemical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Nam-Ho You
- Carbon Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
| | - Myung Jong Kim
- Department of Chemistry, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - Siyoung Q. Choi
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Jae Ryang Hahn
- Department of Chemistry, Department of Bioactive Material Sciences, and Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Hyeonuk Yeo
- Department of Science Education, Kyungpook National University, Daegu 41566, Republic of Korea
- Department of Chemistry Education and Department of Pharmacy, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Se Gyu Jang
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
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Kimura H, Ohtsuka K, Yonekawa M. Epoxy resins with high heat resistance and flame retardancy via a new process. POLYM ADVAN TECHNOL 2020. [DOI: 10.1002/pat.5100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hajime Kimura
- Organic Materials Research Division, Morinomiya Center Osaka Research Institute of Industrial Science and Technology Osaka Japan
| | - Keiko Ohtsuka
- Organic Materials Research Division, Morinomiya Center Osaka Research Institute of Industrial Science and Technology Osaka Japan
| | - Morio Yonekawa
- Organic Materials Research Division, Morinomiya Center Osaka Research Institute of Industrial Science and Technology Osaka Japan
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Harada M, Morioka D, Ochi M. Thermal and mechanical properties of tetra-functional mesogenic type epoxy resin cured with aromatic amine. J Appl Polym Sci 2017. [DOI: 10.1002/app.46181] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Miyuki Harada
- Faculty of Chemistry, Materials and Bioengineering; Kansai University; Suita-shi, Osaka 564-8680 Japan
| | - Daichi Morioka
- 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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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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Jiang H, Wang R, Farhan S, Zhang D, Zheng S. Curing behavior and thermal and mechanical properties enhancement of tetraglycidyl-4,4′-diaminodiphenylmethane/4,4′-diaminodiphenylsulfone using a liquid crystalline epoxy. POLYM INT 2016. [DOI: 10.1002/pi.5073] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hao Jiang
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 PR China
| | - Rumin Wang
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 PR China
| | - Shameel Farhan
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 PR China
| | - Dandan Zhang
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 PR China
| | - Shuirong Zheng
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 PR China
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Harada M, Ando J, Yamaki M, Ochi M. Synthesis, characterization, and mechanical properties of a novel terphenyl liquid crystalline epoxy resin. J Appl Polym Sci 2014. [DOI: 10.1002/app.41296] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Miyuki Harada
- Faculty of Chemistry, Materials and Bioengineering, Kansai University; Suita-shi Osaka 564-8680 Japan
| | - Junichiro Ando
- Faculty of Chemistry, Materials and Bioengineering, Kansai University; Suita-shi Osaka 564-8680 Japan
| | - Motohiro Yamaki
- 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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Hsu SH, Chen RS, Chang YL, Chen MH, Cheng KC, Su WF. Biphenyl liquid crystalline epoxy resin as a low-shrinkage resin-based dental restorative nanocomposite. Acta Biomater 2012; 8:4151-61. [PMID: 22842038 DOI: 10.1016/j.actbio.2012.07.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2012] [Revised: 07/05/2012] [Accepted: 07/20/2012] [Indexed: 11/19/2022]
Abstract
Low-shrinkage resin-based photocurable liquid crystalline epoxy nanocomposite has been investigated with regard to its application as a dental restoration material. The nanocomposite consists of an organic matrix and an inorganic reinforcing filler. The organic matrix is made of liquid crystalline biphenyl epoxy resin (BP), an epoxy resin consisting of cyclohexylmethyl-3,4-epoxycyclohexanecarboxylate (ECH), the photoinitiator 4-octylphenyl phenyliodonium hexafluoroantimonate and the photosensitizer champhorquinone. The inorganic filler is silica nanoparticles (∼70-100 nm). The nanoparticles were modified by an epoxy silane of γ-glycidoxypropyltrimethoxysilane to be compatible with the organic matrix and to chemically bond with the organic matrix after photo curing. By incorporating the BP liquid crystalline (LC) epoxy resin into conventional ECH epoxy resin, the nanocomposite has improved hardness, flexural modulus, water absorption and coefficient of thermal expansion. Although the incorporation of silica filler may dilute the reinforcing effect of crystalline BP, a high silica filler content (∼42 vol.%) was found to increase the physical and chemical properties of the nanocomposite due to the formation of unique microstructures. The microstructure of nanoparticle embedded layers was observed in the nanocomposite using scanning and transmission electron microscopy. This unique microstructure indicates that the crystalline BP and nanoparticles support each other and result in outstanding mechanical properties. The crystalline BP in the LC epoxy resin-based nanocomposite was partially melted during exothermic photopolymerization, and the resin expanded via an order-to-disorder transition. Thus, the post-gelation shrinkage of the LC epoxy resin-based nanocomposite is greatly reduced, ∼50.6% less than in commercialized methacrylate resin-based composites. This LC epoxy nanocomposite demonstrates good physical and chemical properties and good biocompatibility, comparable to commercialized composites. The results indicate that this novel LC nanocomposite is worthy of development and has potential for further applications in clinical dentistry.
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Affiliation(s)
- Sheng-Hao Hsu
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan
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