Abstract
The effect of carbon nanotube (CNT) length on the electrical resistance relaxation of CNT/polysulfone composites is investigated. CNTs were fragmented using controlled high-density energy via ultrasonic vibration. CNT/polysulfone composites were fabricated via solution casting technique, using non-fragmented and fragmented CNTs, and dedicated specimens were subjected to axial tension within the elastic regime. The electrical resistance of the composites was recorded with the aim of tracking the electrical signal during the viscoelastic relaxation. The experimental data were fitted to an electromechanical model inspired from the Burgers equation for polymers creep. Shorter CNTs promote higher electromechanical sensitivity during the mechanical relaxation.
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Acknowledgments
AI Oliva-Avilés acknowledges the support of the “Fondo Sectorial de Investigación para la Educación” through the SEP-CONACYT grant No. 235905. Authors would also like to thank J.E. Corona for the support with the mechanical tests.
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This research was funded by the “Fondo Sectorial de Investigación para la Educación” through the SEP-CONACYT grant No. 235905.
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Conceptualization, AIOA; methodology, GM; software, GM; formal analysis, GM, AIO and AIOA; writing original draft preparation, AIOA; review and editing, GM and AIO; project administration, AIOA; funding acquisition, AIOA. All authors have read and agreed to the published version of the manuscript.
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Madera, G.A., Oliva, A.I. & Oliva-Avilés, A.I. Effect of the carbon nanotube length on the electrical resistance relaxation of viscoelastic polymer nanocomposites. MRS Communications 13, 1144–1149 (2023). https://doi.org/10.1557/s43579-023-00413-7
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DOI: https://doi.org/10.1557/s43579-023-00413-7