Particle/Matrix Interactions in Magnetorheological Elastomers During Processing

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F25%3A63594278" target="_blank" >RIV/70883521:28610/25:63594278 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Particle/Matrix Interactions in Magnetorheological Elastomers During Processing

Original language description

Magnetorheological elastomers (MREs) are composed of a non-magnetic matrix and a magnetic filler. They have the ability to reversibly tune their mechanical properties when an external magnetic field is applied, which renders them “smart” materials. Their tunable flexibility enables their application in various fields, such as soft electronics, robotics, dampers, and shock absorbers. Within the MREs, the interactions between the magnetic particles and the matrix are not well understood yet. They are, however, crucial especially for the processing or recycling of the MREs. The current study investigates the particle/matrix interactions in the MREs composed of various commercial thermoplastic elastomers (TPEs) and carbonyl iron (CI) microparticles. During their molten-state processing, the CI particles are speculated to react with the polymer chains due to the presence of hydroxyl groups on their surface. Such interactions are mainly studied through the means of rheology, microscopy techniques, and gel permeation chromatography (GPC) to investigate their evolution and possibly reveal the degradation of the matrix. The results indicate that when these MREs are going through thermo-mechanical processing, radicals are generated from the matrix as a result of chain scission, and consequently, they react with the hydroxyl groups, forming a covalently bonded network, signified by the increasing storage modulus. These findings are fundamental for the development of recycled and anisotropic MREs with the TPE matrix fabricated using molten-state technologies.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

<a href="/en/project/GA23-07244S" target="_blank" >GA23-07244S: Anisotropic Magnetorheological Elastomers with Controlled Electrical Properties</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů