Thermal Mechanical Properties of Graphene Nano-Composites with Kevlar-Nomex Copolymer: A Comparison of the Physical and Chemical Interactions
This paper reports the preparation of Kevlar-Nomex copolymer nano-composites with exfoliated pristine and functionalized graphene sheets (Grs). The graphene oxide (GrO) platelets were amidized by the reaction of amine-terminated aramid (Ar) with the functional groups present on the GrO surface to pr...
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doaj-dbbc201820ee4ceb9a7511a053cfe81d2020-11-25T04:06:19ZengMDPI AGPolymers2073-43602020-11-01122740274010.3390/polym12112740Thermal Mechanical Properties of Graphene Nano-Composites with Kevlar-Nomex Copolymer: A Comparison of the Physical and Chemical InteractionsJessy Shiju0Fakhreia Al-Sagheer1Zahoor Ahmad2Department of Chemistry, Faculty of Science, Kuwait University, KuwaitDepartment of Chemistry, Faculty of Science, Kuwait University, KuwaitDepartment of Chemistry, Faculty of Science, Kuwait University, KuwaitThis paper reports the preparation of Kevlar-Nomex copolymer nano-composites with exfoliated pristine and functionalized graphene sheets (Grs). The graphene oxide (GrO) platelets were amidized by the reaction of amine-terminated aramid (Ar) with the functional groups present on the GrO surface to prepare the nano-composites films with different loadings of GrO. Chemical changes involved during the oxidation and subsequent amidation were monitored by Raman, FTIR and XP spectroscopic analyses. Morphology of the composite films was studied by atomic force and scanning electron microscopies. Viscoelastic properties of the hybrid films were studied for their glass transition temperature (Tg) and storage modulus by dynamical mechanical thermal analysis (DMTA). A higher shift in glass transition temperature was obtained by chemically binding the aramid copolymer chains on the functionalized Gr sheets. The increase in tensile strength and modulus at various loadings of GrO are compared with the composites using pristine Gr. The effect of interfacial interactions between the matrix chains and the reinforcement on the properties of these hybrids have been explained.https://www.mdpi.com/2073-4360/12/11/2740aramidsgraphenenano-compositesinterfacial chemical bondingvisco-elastic properties |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jessy Shiju Fakhreia Al-Sagheer Zahoor Ahmad |
spellingShingle |
Jessy Shiju Fakhreia Al-Sagheer Zahoor Ahmad Thermal Mechanical Properties of Graphene Nano-Composites with Kevlar-Nomex Copolymer: A Comparison of the Physical and Chemical Interactions Polymers aramids graphene nano-composites interfacial chemical bonding visco-elastic properties |
author_facet |
Jessy Shiju Fakhreia Al-Sagheer Zahoor Ahmad |
author_sort |
Jessy Shiju |
title |
Thermal Mechanical Properties of Graphene Nano-Composites with Kevlar-Nomex Copolymer: A Comparison of the Physical and Chemical Interactions |
title_short |
Thermal Mechanical Properties of Graphene Nano-Composites with Kevlar-Nomex Copolymer: A Comparison of the Physical and Chemical Interactions |
title_full |
Thermal Mechanical Properties of Graphene Nano-Composites with Kevlar-Nomex Copolymer: A Comparison of the Physical and Chemical Interactions |
title_fullStr |
Thermal Mechanical Properties of Graphene Nano-Composites with Kevlar-Nomex Copolymer: A Comparison of the Physical and Chemical Interactions |
title_full_unstemmed |
Thermal Mechanical Properties of Graphene Nano-Composites with Kevlar-Nomex Copolymer: A Comparison of the Physical and Chemical Interactions |
title_sort |
thermal mechanical properties of graphene nano-composites with kevlar-nomex copolymer: a comparison of the physical and chemical interactions |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2020-11-01 |
description |
This paper reports the preparation of Kevlar-Nomex copolymer nano-composites with exfoliated pristine and functionalized graphene sheets (Grs). The graphene oxide (GrO) platelets were amidized by the reaction of amine-terminated aramid (Ar) with the functional groups present on the GrO surface to prepare the nano-composites films with different loadings of GrO. Chemical changes involved during the oxidation and subsequent amidation were monitored by Raman, FTIR and XP spectroscopic analyses. Morphology of the composite films was studied by atomic force and scanning electron microscopies. Viscoelastic properties of the hybrid films were studied for their glass transition temperature (Tg) and storage modulus by dynamical mechanical thermal analysis (DMTA). A higher shift in glass transition temperature was obtained by chemically binding the aramid copolymer chains on the functionalized Gr sheets. The increase in tensile strength and modulus at various loadings of GrO are compared with the composites using pristine Gr. The effect of interfacial interactions between the matrix chains and the reinforcement on the properties of these hybrids have been explained. |
topic |
aramids graphene nano-composites interfacial chemical bonding visco-elastic properties |
url |
https://www.mdpi.com/2073-4360/12/11/2740 |
work_keys_str_mv |
AT jessyshiju thermalmechanicalpropertiesofgraphenenanocompositeswithkevlarnomexcopolymeracomparisonofthephysicalandchemicalinteractions AT fakhreiaalsagheer thermalmechanicalpropertiesofgraphenenanocompositeswithkevlarnomexcopolymeracomparisonofthephysicalandchemicalinteractions AT zahoorahmad thermalmechanicalpropertiesofgraphenenanocompositeswithkevlarnomexcopolymeracomparisonofthephysicalandchemicalinteractions |
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