Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation

Conductive polymer composites (CPC) from renewable resources exhibit many interesting characteristics due to their biodegradability and conductivity changes under mechanical, thermal, chemical, or electrical stress. This study is focused on investigating the physical properties of electroconductive...

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Autores principales:	Hamed Peidayesh, Katarína Mosnáčková, Zdenko Špitalský, Abolfazl Heydari, Alena Opálková Šišková, Ivan Chodák
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	thermoplastic starch conductive polymer composite carbon black electrical conductivity mechanical deformation Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/b0ba360285074f24ae2e7b4fe9af67b1
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id	oai:doaj.org-article:b0ba360285074f24ae2e7b4fe9af67b1
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spelling	oai:doaj.org-article:b0ba360285074f24ae2e7b4fe9af67b12021-11-11T18:48:10ZThermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation10.3390/polym132138192073-4360https://doaj.org/article/b0ba360285074f24ae2e7b4fe9af67b12021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3819https://doaj.org/toc/2073-4360Conductive polymer composites (CPC) from renewable resources exhibit many interesting characteristics due to their biodegradability and conductivity changes under mechanical, thermal, chemical, or electrical stress. This study is focused on investigating the physical properties of electroconductive thermoplastic starch (TPS)–based composites and changes in electroconductive paths during cyclic deformation. TPS–based composites filled with various carbon black (CB) contents were prepared through melt processing. The electrical conductivity and physicochemical properties of TPS–CB composites, including mechanical properties and rheological behavior, were evaluated. With increasing CB content, the tensile strength and Young’s modulus were found to increase substantially. We found a percolation threshold for the CB loading of approximately 5.5 wt% based on the rheology and electrical conductivity. To observe the changing structure of the conductive CB paths during cyclic deformation, both the electrical conductivity and mechanical properties were recorded in parallel using online measurements. Moreover, the instant electrical conductivity measured online during mechanical deformation of the materials was taken as the parameter indirectly describing the structure of the conductive CB network. The electrical conductivity was found to increase during five runs of repeated cyclic mechanical deformations to constant deformation below strain at break, indicating good recovery of conductive paths and their new formation.Hamed PeidayeshKatarína MosnáčkováZdenko ŠpitalskýAbolfazl HeydariAlena Opálková ŠiškováIvan ChodákMDPI AGarticlethermoplastic starchconductive polymer compositecarbon blackelectrical conductivitymechanical deformationOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3819, p 3819 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	thermoplastic starch conductive polymer composite carbon black electrical conductivity mechanical deformation Organic chemistry QD241-441
spellingShingle	thermoplastic starch conductive polymer composite carbon black electrical conductivity mechanical deformation Organic chemistry QD241-441 Hamed Peidayesh Katarína Mosnáčková Zdenko Špitalský Abolfazl Heydari Alena Opálková Šišková Ivan Chodák Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation
description	Conductive polymer composites (CPC) from renewable resources exhibit many interesting characteristics due to their biodegradability and conductivity changes under mechanical, thermal, chemical, or electrical stress. This study is focused on investigating the physical properties of electroconductive thermoplastic starch (TPS)–based composites and changes in electroconductive paths during cyclic deformation. TPS–based composites filled with various carbon black (CB) contents were prepared through melt processing. The electrical conductivity and physicochemical properties of TPS–CB composites, including mechanical properties and rheological behavior, were evaluated. With increasing CB content, the tensile strength and Young’s modulus were found to increase substantially. We found a percolation threshold for the CB loading of approximately 5.5 wt% based on the rheology and electrical conductivity. To observe the changing structure of the conductive CB paths during cyclic deformation, both the electrical conductivity and mechanical properties were recorded in parallel using online measurements. Moreover, the instant electrical conductivity measured online during mechanical deformation of the materials was taken as the parameter indirectly describing the structure of the conductive CB network. The electrical conductivity was found to increase during five runs of repeated cyclic mechanical deformations to constant deformation below strain at break, indicating good recovery of conductive paths and their new formation.
format	article
author	Hamed Peidayesh Katarína Mosnáčková Zdenko Špitalský Abolfazl Heydari Alena Opálková Šišková Ivan Chodák
author_facet	Hamed Peidayesh Katarína Mosnáčková Zdenko Špitalský Abolfazl Heydari Alena Opálková Šišková Ivan Chodák
author_sort	Hamed Peidayesh
title	Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation
title_short	Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation
title_full	Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation
title_fullStr	Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation
title_full_unstemmed	Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation
title_sort	thermoplastic starch–based composite reinforced by conductive filler networks: physical properties and electrical conductivity changes during cyclic deformation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b0ba360285074f24ae2e7b4fe9af67b1
work_keys_str_mv	AT hamedpeidayesh thermoplasticstarchbasedcompositereinforcedbyconductivefillernetworksphysicalpropertiesandelectricalconductivitychangesduringcyclicdeformation AT katarinamosnackova thermoplasticstarchbasedcompositereinforcedbyconductivefillernetworksphysicalpropertiesandelectricalconductivitychangesduringcyclicdeformation AT zdenkospitalsky thermoplasticstarchbasedcompositereinforcedbyconductivefillernetworksphysicalpropertiesandelectricalconductivitychangesduringcyclicdeformation AT abolfazlheydari thermoplasticstarchbasedcompositereinforcedbyconductivefillernetworksphysicalpropertiesandelectricalconductivitychangesduringcyclicdeformation AT alenaopalkovasiskova thermoplasticstarchbasedcompositereinforcedbyconductivefillernetworksphysicalpropertiesandelectricalconductivitychangesduringcyclicdeformation AT ivanchodak thermoplasticstarchbasedcompositereinforcedbyconductivefillernetworksphysicalpropertiesandelectricalconductivitychangesduringcyclicdeformation
_version_	1718431720489877504

Thermoplastic Starch–Based Composite Reinforced by Conductive Filler Networks: Physical Properties and Electrical Conductivity Changes during Cyclic Deformation

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