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المؤلفŠpitalský, Zdenk
المؤلفKratochvíla, Ján
المؤلفCsomorová, Katarína
المؤلفKrupa, Igor
المؤلفGraça, Manuel P. F.
المؤلفCosta, Luis C.
تاريخ الإتاحة2022-05-31T19:01:32Z
تاريخ النشر2015
اسم المنشورJournal of Nanomaterials
المصدرScopus
المعرّفhttp://dx.doi.org/10.1155/2015/168485
معرّف المصادر الموحدhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84939826019&doi=http://dx.doi.org/10.1155%2f2015%2f168485&partnerID=40&md5=004e9014a4949482e039fca2f0785b16
معرّف المصادر الموحدhttp://hdl.handle.net/10576/31891
الملخصThe molecular dynamics of a triblock copolymer and of expanded graphite nanoplatelets were investigated. Composites were prepared using the solution technique. The effects of filler addition and of filler-matrix interactions were investigated using dielectric relaxation spectroscopy (DRS) and dynamic mechanical analysis (DMA). Only one relaxation was observed by DRS, which was associated with the relaxation of the main polymer chain. Both DRS and DMA demonstrated that the addition of the filler does not cause a significant change in either the temperature of the relaxation or its activation energy, which suggests the presence of weak interactions between the filler and matrix. The storage modulus of the composites increased with increasing filler content. The composite containing 8% filler exhibited a storage modulus increase of approximately 394% in the rubber area. Using the DC electrical conductivity measurements, the electrical percolation threshold was determined to be approximately 5%. The dielectric permittivity and conductivity in the microwave region were determined, confirming that percolating behavior and the critical threshold concentration.
اللغةen
الناشرHindawi Publishing Corporation
الموضوعActivation energy
Dielectric relaxation
Dynamic mechanical analysis
Elastic moduli
Fillers
Graphite
Molecular dynamics
Permittivity
Solvents
Styrene
DC electrical conductivity
Dielectric permittivities
Dielectric relaxation spectroscopy
Dynamic mechanical analysis (DMA)
Electrical percolation threshold
Filler-matrix interaction
Mechanical and electrical properties
Styrene-isoprene-styrene copolymers
Electric variables measurement
العنوانMechanical and Electrical Properties of Styrene-Isoprene-Styrene Copolymer Doped with Expanded Graphite Nanoplatelets
النوعArticle
رقم المجلد2015
dc.accessType Abstract Only


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