Influence of solvent and filler on some physical properties of a fluoroelastomer

Righetti, Maria Cristina; Ajroldi, Giuseppe; Vitali, Manuele; Pezzin, G.

doi:10.1002/(sici)1097-4628(19990718)73:3<377::aid-app9>3.0.co;2-8

Cited by 7 publications

(4 citation statements)

References 12 publications

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“…It was discovered that all samples exhibited almost no resilience at −45°C, and their cold‐resistance coefficients at −42.5°C were no more than 0.1, which can be inferred that the polymer chains of fluoroether vulcanizate samples were already at the glass state. Under −40°C, the cold‐resistance coefficients of samples were close to 0.3, which was in line with the expectation, illustrating that CB filling may not significantly influence T g of the fluoroether vulcanizate, for T g is mainly dependent on the properties of the FKM polymer matrix itself 54 . At −37.5°C, samples with CB content of 15 phr and below possessed slightly lower cold‐resistance coefficients than the other samples, which was more obvious at −35°C.…”

Section: Resultssupporting

confidence: 84%

“…Under À40 C, the cold-resistance coefficients of samples were close to 0.3, which was in line with the expectation, illustrating that CB filling may not significantly influence T g of the fluoroether vulcanizate, for T g is mainly dependent on the properties of the FKM polymer matrix itself. 54 At À37.5 C, samples with CB content of 15 phr and below possessed slightly lower cold-resistance coefficients than the other samples, which was more obvious at À35 C. The reason was presumed to be the volume effect of CB filling and the separation of the ordered regions in the molecular chain by the continuous CB-elastomer phase or excessive CB agglomerates, mildly increasing low-temperature resilience of the vulcanizate at temperatures 5-10 C higher than T g .…”

Section: Engineering Measurementsmentioning

confidence: 94%

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Non‐linear viscoelasticity of carbon black–fluoroether rubber mixture studied by large amplitude oscillatory shear tests

Song,

Yang,

Wang

et al. 2023

Polymer Engineering & Sci

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Non‐linear viscoelastic characteristics of carbon black (CB)‐filled fluoroether rubber mixture samples are investigated by large amplitude oscillatory shear (LAOS) tests. Three analysis approaches based on LAOS tests are then used to discuss correlations between rheological behavior and CB‐filling amount. Each non‐linear viscoelastic parameter of the mixture presents a three‐stage characteristic with increasing CB content, which are attributed to the alteration of CB–elastomer network structure, corresponding to the state where gum continuous phase, CB–elastomer mesophase, and excessive CB agglomerates predominate in the mixture compound, respectively. According to the findings in engineering experiments, a CB content of 35–40 phr is recommended, taking into account tensile, hardness, and aging properties. Excessive CB agglomerates are found to reinforce CB–elastomer networks at elevated temperatures. For cold‐resistance properties, structural changes in CB–elastomer network are proven to exert little effect on Tg, but a higher CB content was found to slightly enhance the cold‐resistance coefficient, probably due to the decrease in velocity fraction of gum rubber.Highlights LAOS tests were utilized to study the influences of CB on fluoroelastomer; Three‐stage alteration was observed in the mixture with increasing CB content; Correlation between CB content and the engineering properties was discussed.

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Section: Resultssupporting

confidence: 84%

Section: Engineering Measurementsmentioning

confidence: 94%

Non‐linear viscoelasticity of carbon black–fluoroether rubber mixture studied by large amplitude oscillatory shear tests

Song,

Yang,

Wang

et al. 2023

Polymer Engineering & Sci

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“…Likewise, the mechanism of the post curing of fluororubber was reported by Smith and Perkins. 11 Righetti et al 12 investigated the effect of MT carbon black loading on the glass transition temperature (T g ) of a swollen crosslinked and filled fluororubber. The effect of some fillers such as ISAF, FEF, SRF, and silica on cure, mechanical, aging, and swelling properties of fluororubber and acrylic rubberfluororubber blends was investigated by Kader et al 13 However, there have been very few reports in the literature on the effect of curative and fillers on the cure characteristics and physical properties of MVQ and FKM blends.…”

Section: Introductionmentioning

confidence: 99%

“…11 Righetti et al. 12 investigated the effect of MT carbon black loading on the glass transition temperature ( T g ) of a swollen crosslinked and filled fluororubber. The effect of some fillers such as ISAF, FEF, SRF, and silica on cure, mechanical, aging, and swelling properties of fluororubber and acrylic rubber–fluororubber blends was investigated by Kader et al.…”

Section: Introductionmentioning

confidence: 99%

Effect of curatives and fillers on vulcanization, mechanical, heat aging, and dynamic properties of silicone rubber and fluororubber blends

Guo

Zeng

et al. 2011

Journal of Elastomers & Plastics

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The cure characteristics and mechanical properties of gum and filled silicone rubber (MVQ), fluororubber (FKM), and MVQ-FKM blends with different compositions were investigated before and after aging. The rheometric study showed that optimum cure properties were obtained using the curing system of dicumyl peroxide (DCP) and triallylisocyanurate (TAIC). From varying the curing agents, the optimum levels of DCP and TAIC were found to be 2.0 phr and 1.5 phr, respectively. The addition of different fillers and their loading influenced the cure behaviors, with increased torque and scorch time compared with that of gum blends. The filled 50:50 (w/w) MVQ-FKM blends showed overall performance in mechanical properties. Post-curing improved the strength of MVQ-FKM blends, especially the blends with a higher proportion of FKM. Swelling of the blends was reduced with the addition of fillers and the increased incorporation of FKM. Dynamic mechanical analysis showed two tan d peaks corresponding to MVQ and FKM phase for filled blends, respectively. The storage modulus of the blends increased with the addition of fumed silica, indicating the presence of polymerfiller interaction.

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Effects of filler content on non-linear viscoelasticity of high fluorine content fluoroelastomer mixture investigated through large amplitude oscillatory shear tests

Song,

Yang·,

Wang

et al. 2024

J Rubber Res

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Influence of solvent and filler on some physical properties of a fluoroelastomer

Cited by 7 publications

References 12 publications

Non‐linear viscoelasticity of carbon black–fluoroether rubber mixture studied by large amplitude oscillatory shear tests

Non‐linear viscoelasticity of carbon black–fluoroether rubber mixture studied by large amplitude oscillatory shear tests

Effect of curatives and fillers on vulcanization, mechanical, heat aging, and dynamic properties of silicone rubber and fluororubber blends

Effects of filler content on non-linear viscoelasticity of high fluorine content fluoroelastomer mixture investigated through large amplitude oscillatory shear tests

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