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Electrorheology of polyindole
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SYSNO ASEP 0538937 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Electrorheology of polyindole Author(s) Plachý, T. (CZ)
Žitka, Jan (UMCH-V) RID
Mrlík, M. (CZ)
Bažant, P. (CZ)
Kadlečková, M. (CZ)
Trchová, M. (CZ)
Stejskal, Jaroslav (UMCH-V) RID, ORCID, SAIArticle number 123448 Source Title Polymer. - : Elsevier - ISSN 0032-3861
Roč. 217, 5 March (2021)Number of pages 8 s. Language eng - English Country GB - United Kingdom Keywords polyindole ; electrorheology ; dielectric properties Subject RIV CD - Macromolecular Chemistry OECD category Polymer science R&D Projects GA21-01090S GA ČR - Czech Science Foundation (CSF) GA21-04166S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UMCH-V - RVO:61389013 UT WOS 000632392300004 EID SCOPUS 85100037978 DOI 10.1016/j.polymer.2021.123448 Annotation Polyindole particles were prepared by the oxidative polymerization, where ammonium peroxydisulfate was used as an oxidant at several mole ratios to indole. Prepared spherical micrometre-sized polyindole particles were further used as a dispersed phase in silicone-oil electrorheological (ER) fluids and their rheological behaviour was investigated in the presence and in the absence of an electric field. While different oxidant-to-indole mole ratios did not affect the size and morphology of the particles, their electric and dielectric properties were significantly changed. The highest ER effect was observed for the ER fluid based on the particles with low oxidant-to-indole mole ratio (1:1). Such system exhibited yield stress around 100 Pa at 10 wt% concentration of solid phase. Chain-like structures created upon an application of an electric field were further investigated using an optical microscopy, where significant disparities were found according to electric and dielectric properties of the particles. These findings clearly show that varying mole ratio between the indole and oxidant provides systems with tuneable ER effect. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/pii/S0032386121000719?via%3Dihub
Number of the records: 1