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Dielectric properties OF 40SiO2–40P2O5–20ZrO2 /sulfonated styrene-ethylene-butylene-styrene hybrid membranes for proton exchange membrane fuel cells. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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2
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Charge transfer mechanisms in 40SiO2-40P2O5-20ZrO2 /sulfonated styrene-ethylene-butylene-styrene hybrid membranes for low temperature fuel cells. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Ciuprina F, Panaitescu DM, Enache L, Damian CM, Grigorescu RM, Gabor AR, Nicolae CA, Nistor CL, Trusca R. Control of Dielectric and Mechanical Properties of Styrenic Block Copolymer by Graphite Incorporation. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7577. [PMID: 36363186 PMCID: PMC9658140 DOI: 10.3390/ma15217577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 10/19/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
The structure-property relationship of dielectric elastomers, as well as the methods of improving the control of this relationship, has been widely studied over the last few years, including in some of our previous works. In this paper, we study the control, improvement, and correlation, for a significant range of temperatures, of the mechanical and dielectric properties of polystyrene-b-(ethylene-co-butylene)-b-styrene (SEBS) and maleic-anhydride-grafted SEBS (SEBS-MA) by using graphite (G) as filler in various concentrations. The aim is to analyze the suitability of these composites for converting electrical energy into mechanical energy or vice versa. The dielectric spectroscopy analysis performed in the frequency range of 10 to 1 MHz and at temperatures between 27 and 77 °C emphasized an exponential increase in real permittivity with G concentration, a low level of dielectric losses (≈10-3), as well as the stability of dielectric losses with temperature for high G content. These results correlate well with the increase in mechanical stiffness with an increase in G content for both SEBS/G and SEBS-MA/G composites. The activation energies for the dielectric relaxation processes detected in SEBS/G and SEBS-MA/G composites were also determined and discussed in connection with the mechanical, thermal, and structural properties resulting from thermogravimetric analysis, differential scanning calorimetry, Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses.
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Affiliation(s)
- Florin Ciuprina
- ELMAT Laboratory, Faculty of Electrical Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Denis Mihaela Panaitescu
- Polymer Department, National Institute for Research and Development in Chemistry and Petrochemistry, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Laura Enache
- ELMAT Laboratory, Faculty of Electrical Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Celina Maria Damian
- Advanced Polymer Materials Group, University Politehnica of Bucharest, 1–7 Gh. Polizu Street, 011061 Bucharest, Romania
| | - Ramona Marina Grigorescu
- Polymer Department, National Institute for Research and Development in Chemistry and Petrochemistry, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Augusta Raluca Gabor
- Polymer Department, National Institute for Research and Development in Chemistry and Petrochemistry, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Cristian Andi Nicolae
- Polymer Department, National Institute for Research and Development in Chemistry and Petrochemistry, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Cristina Lavinia Nistor
- Polymer Department, National Institute for Research and Development in Chemistry and Petrochemistry, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Roxana Trusca
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 1–7 Gh. Polizu Street, 011061 Bucharest, Romania
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Teruel‐Juanes R, Río C, Gil‐Castell O, Primaz C, Ribes‐Greus A. Triblock
SEBS
/
DVB
crosslinked and sulfonated membranes: Fuel cell performance and conductivity. J Appl Polym Sci 2021. [DOI: 10.1002/app.50671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Roberto Teruel‐Juanes
- Instituto de Tecnología de Materiales (ITM) Universitat Politècnica de València (UPV) Camino de Vera s/n Valencia Spain
| | - Carmen Río
- Instituto de Ciencia y Tecnología de Polímeros (ICTP–CSIC) Juan de la Cierva 3 Madrid Spain
| | - Oscar Gil‐Castell
- Instituto de Tecnología de Materiales (ITM) Universitat Politècnica de València (UPV) Camino de Vera s/n Valencia Spain
| | - Carmem Primaz
- Instituto de Tecnología de Materiales (ITM) Universitat Politècnica de València (UPV) Camino de Vera s/n Valencia Spain
| | - Amparo Ribes‐Greus
- Instituto de Tecnología de Materiales (ITM) Universitat Politècnica de València (UPV) Camino de Vera s/n Valencia Spain
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Teruel-Juanes R, Pascual-Jose B, del Río C, García O, Ribes-Greus A. Dielectric analysis of photocrosslinked and post-sulfonated styrene-ethylene-butylene-styrene block copolymer based membranes. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104715] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Dielectric Relaxation Dynamics of Clay‐Containing Low‐Density polyethylene Blends and Nanocomposites. POLYM ENG SCI 2020. [DOI: 10.1002/pen.25352] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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8
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PVA/Chitosan/Silver Nanoparticles Electrospun Nanocomposites: Molecular Relaxations Investigated by Modern Broadband Dielectric Spectroscopy. NANOMATERIALS 2018; 8:nano8110888. [PMID: 30388765 PMCID: PMC6266278 DOI: 10.3390/nano8110888] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 10/19/2018] [Accepted: 10/23/2018] [Indexed: 11/17/2022]
Abstract
In this study, we used broadband dielectric spectroscopy to analyze polymer nanofibers of poly(vinyl alcohol)/chitosan/silver nanoparticles. We also studied the effect of incorporating silver nanoparticles in the polymeric mat, on the chain motion dynamics and their interactions with chitosan nanofibers, and we calculated the activation energies of the sub-Tg relaxation processes. Results revealed the existence of two sub-Tg relaxations, the first gets activated at very low temperature (-90 °C) and accounts for motions of the side groups within the repeating unit such as ⁻NH₂, ⁻OH, and ⁻CH₂OH in chitosan and poly(vinyl alcohol). The second process gets activated around -10 °C and it is thought to be related to the local main chain segments' motions that are facilitated by fluctuations within the glycosidic bonds of chitosan. The activation energy for the chitosan/PVA/AgNPs nanocomposite nanofibers is much higher than that of the chitosan control film due to the presence of strong interactions between the amine groups and the silver nanoparticles. Kramers⁻Krönig integral transformation of the ε'' vs. f spectra in the region of the chitosan Tg helped resolve this relaxation and displayed the progress of its maxima with increasing temperature in the regular manner.
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Helal E, Amurin L, Carastan D, de Sousa R, David E, Fréchette M, Demarquette N. Interfacial molecular dynamics of styrenic block copolymer-based nanocomposites with controlled spatial distribution. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.02.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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10
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Greenhoe BM, Hassan MK, Wiggins JS, Mauritz KA. Universal power law behavior of the AC conductivity versus frequency of agglomerate morphologies in conductive carbon nanotube-reinforced epoxy networks. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/polb.24121] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Brian M. Greenhoe
- School of Polymers and High Performance Materials; the University of Southern Mississippi; Hattiesburg Mississippi
| | | | - Jeffrey S. Wiggins
- School of Polymers and High Performance Materials; the University of Southern Mississippi; Hattiesburg Mississippi
| | - Kenneth A. Mauritz
- School of Polymers and High Performance Materials; the University of Southern Mississippi; Hattiesburg Mississippi
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Childers CH, Hassan MK, Mauritz KA, Wiggins JS. Molecular scale cure rate dependence of thermoset matrix polymers. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2015.08.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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12
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Hassan MK, Tucker SJ, Abukmail A, Wiggins JS, Mauritz KA. Polymer chain dynamics in epoxy based composites as investigated by broadband dielectric spectroscopy. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2015.07.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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13
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Helal E, Demarquette N, Amurin L, David E, Carastan D, Fréchette M. Styrenic block copolymer-based nanocomposites: Implications of nanostructuration and nanofiller tailored dispersion on the dielectric properties. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.03.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Synthesis and characterization of sulfonated poly(styrene-b-(ethylene-ran-butylene)-b-styrene)/(strontium titanate) nanocomposites. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.03.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Panaitescu DM, Vuluga Z, Notingher PV, Nicolae C. The effect of poly[styrene-b
-(ethylene-co
-butylene)- b
-styrene] on dielectric, thermal, and morphological characteristics of polypropylene/silica nanocomposites. POLYM ENG SCI 2013. [DOI: 10.1002/pen.23475] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Denis Mihaela Panaitescu
- Polymer Department; National Institute for Research and Development in Chemistry and Petrochemistry; 060021 Bucharest Romania
| | - Zina Vuluga
- Polymer Department; National Institute for Research and Development in Chemistry and Petrochemistry; 060021 Bucharest Romania
| | - Petru V. Notingher
- Faculty of Electrical Engineering; ELMAT Laboratory; University POLITEHNICA of Bucharest; 060042 Bucharest Romania
| | - Cristian Nicolae
- Polymer Department; National Institute for Research and Development in Chemistry and Petrochemistry; 060021 Bucharest Romania
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