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Zhang Y, Yang J, Li L, Li R, Chen J, Li N, Zhang X. Study on the preparation of novel FR-245/MCM-41 suppressant and its inhibition mechanism on oil shale deflagration flame. J Loss Prev Process Ind 2022. [DOI: 10.1016/j.jlp.2022.104946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Goyal S, Forrester MJ, Coverdell D, Torres S, Lee MW, Cochran EW. High-Temperature-Performance Cyanate Ester Composites with Carboranes. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01410] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Shailja Goyal
- Department of Chemical and Biological Engineering, Iowa State University, Ames 50011, Iowa, United States
| | - Michael J. Forrester
- Department of Chemical and Biological Engineering, Iowa State University, Ames 50011, Iowa, United States
| | - Danielle Coverdell
- Kansas City National Security Campus, 14520 Botts Road, Kansas City 64147, Missouri, United States
| | - Sabrina Torres
- Kansas City National Security Campus, 14520 Botts Road, Kansas City 64147, Missouri, United States
| | - Mark W. Lee
- Department of Chemistry, University of Missouri, Columbia 65211, Missouri, United States
| | - Eric W. Cochran
- Department of Chemical and Biological Engineering, Iowa State University, Ames 50011, Iowa, United States
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Salunke A, Sasidharan S, Cherukattu Gopinathapanicker J, Kandasubramanian B, Anand A. Cyanate Ester—Epoxy Blends for Structural and Functional Composites. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05008] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Akshaykumar Salunke
- Composites Research Center, Research and Development Establishment (Engineers), DRDO, Ministry of Defence, Pune, 411015, India
- Department of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Ministry of Defence, Pune, 411025, India
| | - Sarath Sasidharan
- Composites Research Center, Research and Development Establishment (Engineers), DRDO, Ministry of Defence, Pune, 411015, India
- School of Materials Science and Engineering, National Institute of Technology, Calicut, 673601, India
| | - Jayalakshmi Cherukattu Gopinathapanicker
- Composites Research Center, Research and Development Establishment (Engineers), DRDO, Ministry of Defence, Pune, 411015, India
- Department of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Ministry of Defence, Pune, 411025, India
| | - Balasubramanian Kandasubramanian
- Department of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Ministry of Defence, Pune, 411025, India
| | - Anoop Anand
- Composites Research Center, Research and Development Establishment (Engineers), DRDO, Ministry of Defence, Pune, 411015, India
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Ameliorated Mechanical and Dielectric Properties of Heat-Resistant Radome Cyanate Composites. Molecules 2020; 25:molecules25143117. [PMID: 32650504 PMCID: PMC7397165 DOI: 10.3390/molecules25143117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 07/05/2020] [Accepted: 07/07/2020] [Indexed: 12/05/2022] Open
Abstract
In order to improve the mechanical and dielectric properties of radome cyanate, a synergistic reinforcement method is employed to develop a resin-based ternary-composite with high heat-resistance and preferable radar-band transmission, which is expected to be applied to fabricate radomes capable of resisting high temperature and strong electric field. According to copolymerization characteristics and self-curing mechanism, epoxy resin (EP) and bismaleimide (BMI) are employed as reinforcements mixed into a cyanate ester (CE) matrix to prepare CE/BMI/EP composites of a heat-resistant radome material by high-temperature viscous-flow blending methods under the catalysis of aluminum acetylpyruvate. The crystallization temperature, transition heat, and reaction rate of cured polymers were tested to analyze heat-resistance characteristics and evaluate material synthesis processes. Scanning electron microscopy was used to characterize the micro-morphology of tensile fracture, which was combined with the tensile strength test and dynamic thermomechanical analysis to investigate the composite modifications on tenacity and rigidity. Weibull statistics were performed to analyze the experimental results of the dielectric breakdown field, and the dielectric-polarization and wave-transmission performances were investigated according to alternative current dielectric spectra. Compared with the pure CE and the CE composites individually reinforced by EP or BMI, the CE/BMI/EP composite acquires the most significant amelioration in both the mechanical and electrical insulation performances as indicated by the breaking elongation and dielectric breakdown strength being simultaneously improved by 40%, which are consistently manifested by the obviously increased transverse lines uniformly distributed on the fracture cross-section. Furthermore, the glass-transition temperature of CE/BMI/EP composite reaches the highest values of nearly 300 °C, with the relative dielectric constant and dielectric loss being mostly reduced to less than 3.2 and 0.01, respectively. The experimental results demonstrate that the CE/BMI/EP composite is a highly-qualified wave-transmission material with preferences in mechanical, thermostability, and electrical insulation performances, suggesting its prospective applications in low-frequency transmittance radomes.
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Fan C, Tian C, Chen K, Gao X, Jia X, Wang J. Preparation and characterization of cyanate/epoxy foam. HIGH PERFORM POLYM 2015. [DOI: 10.1177/0954008315573337] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A new type of cyanate (CE)/epoxy (EP) foam with bisphenol-A dicyanate ester prepolymer and diglycidyl ether of bisphenol-A (BADCy/DGEBA) has been successfully prepared through a two-step process. The structure and properties of CE/EP foam were studied. The results reveal that the CE/EP foams, with relatively uniform cell structure, were composed of closed cells as confirmed by scanning electron microscopy. The compressive strength increased from 0.507 MPa to 3.021 MPa, and the compressive modulus ( E) increased from 15 MPa to 123 MPa as the density increased from 0.103 g cm−3 to 0.305 g cm−3. Dynamic mechanical analysis revealed that the CE/EP foams possessed a high glass transition temperature ( Tg) (203°C) and that density had only a little impact on Tg. Moreover, the excellent thermal stability presented with the onset of weight loss taken at 5% value was above 320°C, and the residual weight of the foam was more than 21.6% at 800°C. With increase in the density of CE/EP foams, the dielectric constants (ε) gradually decreased. For the foam with density of ρ = 0.162 g cm−3, the value of ε was as low as 2.28 at the frequency of 10 kHz.
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Affiliation(s)
- Chunchun Fan
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, China
- Material Science and Engineering College, Southwest University of Science and Technology, Mianyang, China
| | - Chunrong Tian
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, China
| | - Keping Chen
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, China
| | - Xia Gao
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, China
- Material Science and Engineering College, Southwest University of Science and Technology, Mianyang, China
| | - Xiaorong Jia
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, China
| | - Jianhua Wang
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, China
- Material Science and Engineering College, Southwest University of Science and Technology, Mianyang, China
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Lin CH, Huang SJ, Wang PJ, Lin HT, Dai SA. Miscibility, Microstructure, and Thermal and Dielectric Properties of Reactive Blends of Dicyanate Ester and Diamine-Based Benzoxazine. Macromolecules 2012. [DOI: 10.1021/ma3009433] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ching Hsuan Lin
- Department
of Chemical Engineering, National Chung Hsing University, Taichung, Taiwan
- Center of Nanoscience & Nanotechnology, National Chung Hsing University, Taichung, Taiwan
| | - Shih Jiang Huang
- Department
of Chemical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Po Jen Wang
- Department
of Chemical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Hong Tze Lin
- Department
of Chemical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Shenghong A. Dai
- Department
of Chemical Engineering, National Chung Hsing University, Taichung, Taiwan
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Li X, Xia Y, Xu W, Ran Q, Gu Y. The curing procedure for a benzoxazine–cyanate–epoxy system and the properties of the terpolymer. Polym Chem 2012. [DOI: 10.1039/c2py20133j] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Li X, Gu Y. The co-curing process of a benzoxazine-cyanate system and the thermal properties of the copolymers. Polym Chem 2011. [DOI: 10.1039/c1py00379h] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Zeng M, Lu C, Wang B, Qi C. Free volume hole size of Cyanate ester resin/Epoxy resin interpenetrating networks and its correlations with physical properties. Radiat Phys Chem Oxf Engl 1993 2010. [DOI: 10.1016/j.radphyschem.2010.03.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Anuradha G, Rakesh S, Sarojadevi M. Synthesis and thermal properties of cyanate esters containing sulfoxide linkage. POLYM ENG SCI 2009. [DOI: 10.1002/pen.21365] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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