Influence of ionic liquids on the dielectric relaxation behavior of CNT based elastomer nanocomposites

Das, Amit; Steinhauser, Dagmar; Klueppel, M.; Heinrich, Gert; Subramaniam, Kalaivani

doi:10.3144/expresspolymlett.2012.98

Cited by 33 publications

(19 citation statements)

References 16 publications

(26 reference statements)

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“…[8,9,10,11] In later work on ILCNTs/CR composites, Subramaniam et al reported that combining CR with ionic liquid modified CNTs causes an enhancement in thermal stability, which can be attributed to the fine dispersion of the modified tubes in the CR matrix. [12] In other investigations, the electrical conductivity of IL-CNTs/CR composites increased upon accelerated thermal aging, and therefore, the authors concluded that these composites may be useful for applications where conductivity at elevated temperatures is required.…”

Section: Introductionmentioning

confidence: 99%

Properties of Carboxylated Nitrile Rubber/Hydrotalcite Composites Containing Imidazolium Ionic Liquids

Marzec

Laskowska

Boiteux

et al. 2014

Macromolecular Symposia

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International audienceIn the present study, two types imidazolium salts containing the common cation 1-butyl-3-methylimidazolium-hydrophilic tetrachloroaluminate (BMIM AlCl4) and hydrophobic bis(trifluoromethylsulfonyl) imide (BMIM TFSI) are analyzed for effects on the ionic conductivity and the state of cure of carboxylated nitrile rubber/hydrotalcite composites (XNBR/HT). Imidazolium salt containing tetrachloroaluminate ions effectively participates in the crosslinking process of carboxylated nitrile rubber and contributes to an increase in the crosslink density of the composites. Hydrophobic 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide was found to be compatible with carboxylated nitrile rubber. In the presence of 15 parts per hundred rubber (phr) of BMIM TFSI, the ionic conductivity of the composites increases from 10(-10) to 10(-7) S center dot cm(-1), and the glass transition temperature (T-g) of the XNBR shifts towards lower temperatures from -23 degrees C to -33 degrees C

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Section: Introductionmentioning

confidence: 99%

Properties of Carboxylated Nitrile Rubber/Hydrotalcite Composites Containing Imidazolium Ionic Liquids

Marzec

Laskowska

Boiteux

et al. 2014

Macromolecular Symposia

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“…The ability of ionic liquids to functionalise and improve the dispersion of carbon nanotubes has been intensively studied [9,10] also in diene elastomers [11]. Ionic liquids resulted in the development of a conductive polychloroprene rubber containing a low concentration of multi-walled carbon nanotubes (MWCNTs) [12,13]. The fine homogeneous dispersion of the MWCNTs and their strong secondary network in the elastomer resulted in the high conductivity of the composite.…”

Section: Introductionmentioning

confidence: 99%

Effect of ionic liquids on the dispersion of zinc oxide and silica nanoparticles, vulcanisation behaviour and properties of NBR composites

Maciejewska¹,

Zaborski²

2014

Express Polym. Lett.

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Abstract. The aim of this work was to study the activity of several alkylpyrrolidinium, alkylpyridinium, alkylpiperidinium and benzylimidazolium ionic liquids (ILs) for the purpose of improving the dispersion degree of vulcanisation activator and filler nanoparticles in the acrylonitrile-butadiene elastomer (NBR). The effect of the ionic liquids on the vulcanisation kinetics of the rubber compounds, crosslink density and mechanical properties of the vulcanisates and their resistance to thermo-oxidative and UV ageing was studied. The use of ionic liquids allowed for a homogeneous dispersion of nanoparticles in the elastomer without detrimental effects on the vulcanisation process. The physical properties and the thermal stability of the obtained vulcanisates were significantly improved. Ionic liquids increased the crosslink density of the vulcanisates and their damping properties. Pirydinium and piperidinium hexafluorophosphates were most effective at increasing the crosslink density and improving the properties of NBR composites.

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“…For example, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BmiTFSI) was used to develop conducting composite of multi-walled carbon nanotubes (MWCNTs) and polychloroprene rubber [12,16]. The cation-p interactions between the BmiTFSI and tubes resulted in uniform dispersion of MWCNTs and the formation of their percolating network, which significantly increased the conductivity of the rubber composite.…”

Section: Introductionmentioning

confidence: 99%

Ionic liquids as coagents for sulfur vulcanization of butadiene–styrene elastomer filled with carbon black

Maciejewska

Zaborski

2018

Polym. Bull.

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The aim of this work was to study the activity of several alkylimidazolium salts of bis(trifluoromethylsulfonyl)imides to obtain a very fast vulcanization of the butadiene-styrene (SBR) elastomer. Ionic liquids (ILs) such as alkylimidazolium salts with ethyl-, propyl-, butyl-, hexyl-, decyl-, dodecyl-, and hexadecyl chains in the cation together with nanosized zinc oxide are used to develop elastomer composites with very short vulcanization time and a reduced amount of vulcanization activator. In this article, we discuss the effect of the ILs with respect to the length of alkyl chain in their cation on the vulcanization kinetics of rubber compounds. The influence of ILs on the crosslink density as well as the mechanical properties of the vulcanizates and their resistance to thermo-oxidative and UV aging were also studied. ILs resulted in a shortened optimal vulcanization time and reduced the onset vulcanization temperature compared to zinc oxide containing rubber compound. This is very important from a technological point of view. A considerable increase in the crosslink density of vulcanizates was also observed.

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Influence of ionic liquids on the dielectric relaxation behavior of CNT based elastomer nanocomposites

Cited by 33 publications

References 16 publications

Properties of Carboxylated Nitrile Rubber/Hydrotalcite Composites Containing Imidazolium Ionic Liquids

Properties of Carboxylated Nitrile Rubber/Hydrotalcite Composites Containing Imidazolium Ionic Liquids

Effect of ionic liquids on the dispersion of zinc oxide and silica nanoparticles, vulcanisation behaviour and properties of NBR composites

Ionic liquids as coagents for sulfur vulcanization of butadiene–styrene elastomer filled with carbon black

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