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Liu W, Huang W, Song N, Wu Y, Zhao X, Chen K. Effect of stoichiometry on chemical structure, dielectric and mechanical properties of epoxy resin under gamma irradiation. Radiat Phys Chem Oxf Engl 1993 2023. [DOI: 10.1016/j.radphyschem.2022.110551] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Chin CDW, Ringgold MA, Redline EM, Bregman AG, Hattar K, Peretti AS, Treadwell LJ. Fabrication, thermal analysis, and heavy ion irradiation resistance of epoxy matrix nanocomposites loaded with silane-functionalized ceria nanoparticles. Phys Chem Chem Phys 2022; 24:6552-6569. [PMID: 35262100 DOI: 10.1039/d1cp05033h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper describes a detailed understanding of how nanofillers function as radiation barriers within the polymer matrix, and how their effectiveness is impacted by factors such as composition, size, loading, surface chemistry, and dispersion. We designed a comprehensive investigation of heavy ion irradiation resistance in epoxy matrix composites loaded with surface-modified ceria nanofillers, utilizing tandem computational and experimental methods to elucidate radiolytic damage processes and relate them to chemical and structural changes observed through thermal analysis, vibrational spectroscopy, and electron microscopy. A detailed mechanistic examination supported by FTIR spectroscopy data identified the bisphenol A moiety as a primary target for degradation reactions. Results of computational modeling by the Stopping Range of Ions in Matter (SRIM) Monte Carlo simulation were in good agreement with damage analysis from surface and cross-sectional SEM imaging. All metrics indicated that ceria nanofillers reduce the damage area in polymer nanocomposites, and that nanofiller loading and homogeneity of dispersion are key to effective damage prevention. The results of this study represent a significant pathway for engineered irradiation tolerance in a diverse array of polymer nanocomposite materials. Numerous areas of materials science can benefit from utilizing this facile and effective method to extend the reliability of polymer materials.
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Affiliation(s)
- Clare Davis-Wheeler Chin
- Advanced Materials Laboratory, Sandia National Laboratories, 1001 University Blvd. SE, Suite 100, Albuquerque, NM 87106, USA.
| | - Marissa A Ringgold
- Advanced Materials Laboratory, Sandia National Laboratories, 1001 University Blvd. SE, Suite 100, Albuquerque, NM 87106, USA.
| | - Erica M Redline
- Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185, USA
| | - Avi G Bregman
- Advanced Materials Laboratory, Sandia National Laboratories, 1001 University Blvd. SE, Suite 100, Albuquerque, NM 87106, USA.
| | - Khalid Hattar
- Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185, USA
| | - Amanda S Peretti
- Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185, USA
| | - LaRico J Treadwell
- Advanced Materials Laboratory, Sandia National Laboratories, 1001 University Blvd. SE, Suite 100, Albuquerque, NM 87106, USA.
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Degeneration and damage mechanism of epoxy-based shape memory polymer under 170 keV vacuum proton irradiation. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.05.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gamma-rays initiated cationic polymerization of epoxy resins and their carbon nanotubes composites. Radiat Phys Chem Oxf Engl 1993 2016. [DOI: 10.1016/j.radphyschem.2015.11.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Cho E, Park G, Lee JW, Cho SM, Kim T, Kim J, Choi W, Ohm WS, Kang S. Effect of alumina composition and surface integrity in alumina/epoxy composites on the ultrasonic attenuation properties. ULTRASONICS 2016; 66:133-139. [PMID: 26585217 DOI: 10.1016/j.ultras.2015.10.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 08/27/2015] [Accepted: 10/30/2015] [Indexed: 06/05/2023]
Abstract
We report a method of fabricating backing blocks for ultrasonic imaging transducers, using alumina/epoxy composites. Backing blocks contain scatterers such as alumina particles interspersed in the epoxy matrix for the effective scattering and attenuation of ultrasound. Here, the surface integrity can be an issue, where the composite material may be damaged during machining because of differences in strength, hardness and brittleness of the hard alumina particles and the soft epoxy matrix. Poor surface integrity results in the formation of air cavities between the backing block and the piezoelectric element upon assembly, hence the increased reflection off the backing block and the eventual degradation in image quality. Furthermore, with an issue of poor surface integrity due to machining, it is difficult to increase alumina as scatterers more than a specific mass fraction ratio. In this study, we increased the portion of alumina within epoxy matrix by obtaining an enhanced surface integrity using a net shape fabrication method, and verified that this method could allow us to achieve higher ultrasonic attenuation. Backing blocks were net-shaped with various mass fractions of alumina to characterize the formability and the mechanical properties, including hardness, surface roughness and the internal micro-structure, which were compared with those of machined backing blocks. The ultrasonic attenuation property of the backing blocks was also measured.
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Affiliation(s)
- Eikhyun Cho
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
| | - Gwanwoo Park
- School of Mechanical Engineering, Korea University, 140 Anam-ro, Seongbuk-gu, Seoul 136-701, South Korea
| | - Jae-Wan Lee
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
| | - Sung-Min Cho
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
| | - Taekyung Kim
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
| | - Joongeok Kim
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
| | - Wonjoon Choi
- School of Mechanical Engineering, Korea University, 140 Anam-ro, Seongbuk-gu, Seoul 136-701, South Korea.
| | - Won-Suk Ohm
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
| | - Shinill Kang
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea.
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Bosland L, Dickinson S, Glowa G, Herranz L, Kim H, Powers D, Salay M, Tietze S. Iodine–paint interactions during nuclear reactor severe accidents. ANN NUCL ENERGY 2014. [DOI: 10.1016/j.anucene.2014.07.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Liu C, Li K, Li H, Zhang S, Zhang Y. The effect of zirconium incorporation on the thermal stability and carbonized product of phenol–formaldehyde resin. Polym Degrad Stab 2014. [DOI: 10.1016/j.polymdegradstab.2014.01.013] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nowicki A, Przybytniak G, Legocka I, Mirkowski K. Radiation-induced degradation of an epoxy thermoset supported by hydrogen peroxide. Radiat Phys Chem Oxf Engl 1993 2014. [DOI: 10.1016/j.radphyschem.2013.04.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Teh CH, Rasid R, Daik R, Ahmad SHJ. DGEBA-grafted polyaniline: Synthesis, characterization and thermal properties. J Appl Polym Sci 2011. [DOI: 10.1002/app.33221] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Longiéras N, Sebban M, Palmas P, Rivaton A, Gardette J. Degradation of epoxy resins under high energy electron beam irradiation: Radio-oxidation. Polym Degrad Stab 2007. [DOI: 10.1016/j.polymdegradstab.2007.01.035] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Influence of silica fillers during the electron irradiation of DGEBA/TETA epoxy resins, part III: Solid-state NMR investigations. Polym Degrad Stab 2007. [DOI: 10.1016/j.polymdegradstab.2007.02.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Benard F, Campistron I, Laguerre A, Vigier G, Laval F. Influence of silica fillers during the electron irradiation of DGEBA/TETA epoxy resins, part II: Study of the thermomechanical properties. Polym Degrad Stab 2006. [DOI: 10.1016/j.polymdegradstab.2006.01.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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