Influence of mixed sulfur/peroxide curing system and thermo-oxidative ageing on the properties of rubber magnetic composites

Kruželák, Ján; Sykora, Richard E.; Hudeč, Ivan

doi:10.1007/s10965-014-0636-8

Cited by 16 publications

(5 citation statements)

References 19 publications

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“…Thus, dCBp seems to behave as an effective catalyst agent for rubber compounding. However, if the t S is not sufficient to enable for instance, a proper mixing before the beginning of vulcanization, different inhibitors can be used (Kruželák et al, 2015). Generally speaking, the filler addition in rubber compounding reduces both the scorch and the vulcanization time.…”

Section: Fig 7 Vulcanization Curve Of the Fillers Blends Usedmentioning

confidence: 99%

Carbon black recovery from waste tire pyrolysis by demineralization: Production and application in rubber compounding

et al. 2019

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Pyrolysis offers the possibility to convert waste tires into liquid and gaseous fractions as well as a carbon-rich solid (CBp), which contains the original carbon black (CB) and the inorganic compounds used in tire manufacture. Whilst both liquid and gaseous fractions can be valorized without further processing, there is a general consensus that CBp needs to be improved before it can be considered a commercial product, seriously penalizing the pyrolysis process profitability. In this work, the CBp produced in a continuous pyrolysis process was demineralized (chemical leaching) with the aim of recovering the CB trapped into the CBp and thus, producing a standardized CB product for commercial purposes. The demineralization process was conducted by using cheap and common reagents (HCl and NaOH). In this sense, the acid treatment removed most of the mineral matter contained in the CBp and concentration was the main parameter controlling the demineralization process. An ash content of 4.9 wt.% was obtained by using 60 min of soaking time, 60 °C of temperature, 10 mL/g of reagent/CBp ratio and HCl 4M. The demineralized CBp (dCBp) showed a carbon content of 92.9 wt.%, while the FRX analysis indicated that SiO 2 is the major component into the ash. The BET surface area was 76.3 m 2 /g, and textural characterizations (SEM/EDX and TEM) revealed that dCBp is composed by primary particles lower than 100 nm. Although dCBp showed a low structure, the surface chemistry was rich in surface acidic groups. Finally, dCBp was used in Styrene Butadiene Rubber (SBR) compounding, probing its technical feasibility as substitute of commercial CB N550.

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Section: Fig 7 Vulcanization Curve Of the Fillers Blends Usedmentioning

confidence: 99%

Carbon black recovery from waste tire pyrolysis by demineralization: Production and application in rubber compounding

et al. 2019

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“…[ 5 ] The NR_P, besides presenting lower modulus and T g values, also showed a higher tan δ peak, which is in agreement with the minor degree of crosslinking in the presence of organic peroxide. [ 6 ] Kruzelak [ 7 ] observed a similar behavior in the crosslink density of an EPDM magnetic rubber, which was reduced with increasing peroxide content.…”

Section: Resultsmentioning

confidence: 80%

Effect of Vulcanization System on Damping Properties of Natural Rubber

Baruel

Mello

Menezes

et al. 2022

Macromolecular Symposia

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Natural rubber (NR) is vulcanized with three different systems, using sulfur, peroxide and a mixed system consisting of peroxide and sulfur. The viscoelastic behavior of rubbers is evaluated by Dynamic Mechanical Analysis (DMA), using constant or multiple frequencies. From both DMA analysis methods, it is possible to verify that the rubbers vulcanized with sulfur or with the mixed system presented superior storage modulus in the rubbery region, and higher Tg values compared to the rubber vulcanized with dicumyl peroxide. These results indicate a higher degree of crosslinking for the NR containing sulfur in its vulcanization system. The master curves show that the rubber vulcanized with sulfur presented relaxation at a lower frequency due to the higher hardness, which is a consequence of the higher degree of crosslinking.

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“…It is also worth noting that the resins, in addition to improving interphase interactions, can also contribute to crosslinking of rubber matrix by the increasing of crosslinks density and possibly modifying their structure. Increased content of longer, more elastic or even labile crosslinks reduces interfacial tension [ 19 ]. Such modification could be beneficial in terms of mechanical properties, adhesion and eventually the durability of rubber sensors containing silver nanowires, also influencing their conducting behavior, to which has the most attention been paid so far [ 20 ].…”

Section: Discussionmentioning

confidence: 99%

Influence of Modified Epoxy Resins on Peroxide Curing, Mechanical Properties and Adhesion of SBR, NBR and XNBR to Silver Wires—Part II: Application of Carboxy-Containing Peroxy Oligomer (CPO)

et al. 2021

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This research was aimed at verifying the effect of carboxy-containing peroxy oligomer (CPO) addition on the possibility of rubber crosslinking and a subsequent adhesion of the modified rubber to silver wires. Three commonly industrially used rubbers were selected for the study: styrene–butadiene rubber (SBR), acrylonitrile–butadiene rubber (NBR) and carboxylated acrylonitrile–butadiene rubber (XNBR), together with carboxy-containing peroxy oligomer (CPO). An improvement in the adhesion of rubbers to silver wires was observed when applying the oligomeric peroxide with functional groups, with no deterioration of mechanical properties of the vulcanizates. Crosslinking synergy between dicumyl peroxide (DCP) and the modifier could hardly be observed. Nevertheless, the studies demonstrated, that to a small extent, even the CPO itself can crosslink NBR and especially XNBR, resulting in a material of notable elasticity and adhesion to silver wires.

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Influence of mixed sulfur/peroxide curing system and thermo-oxidative ageing on the properties of rubber magnetic composites

Cited by 16 publications

References 19 publications

Carbon black recovery from waste tire pyrolysis by demineralization: Production and application in rubber compounding

Carbon black recovery from waste tire pyrolysis by demineralization: Production and application in rubber compounding

Effect of Vulcanization System on Damping Properties of Natural Rubber

Influence of Modified Epoxy Resins on Peroxide Curing, Mechanical Properties and Adhesion of SBR, NBR and XNBR to Silver Wires—Part II: Application of Carboxy-Containing Peroxy Oligomer (CPO)

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