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

Guo, Jin; Zeng, Xingrong; Li, Hongqiang; Luo, Qiang

doi:10.1177/0095244311418440

Cited by 12 publications

(7 citation statements)

References 18 publications

(24 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with the single MVQ or FKM, the water contact angle of the composite material is increased. Guo 39 studied the effect of mixed fillers and pointed out that the mixed introduction of chemical fillers can effectively increase the loading of fillers, resulting in higher mixed filler polymers and filler networks. The results show that the composites formed by MVQ and FKM with the help of N990 filler and silica have the effects on reducing the surface energy, the contact angle, and the surface tension and improving the compatibility of FMC composites.…”

Section: Results and Discussionmentioning

confidence: 99%

Preparation of High-Strength and Excellent Compatibility Fluorine/Silicone Rubber Composites under the Synergistic Effect of Fillers

et al. 2023

View full text Add to dashboard Cite

Fluorine/silicone composite rubber is widely used as a sealing material in aerospace, missile, automotive, petroleum, and other industries, but the traditional process does not use synergistic fillers to strengthen the composite system. In this research, fumed SiO2 and black caron (N990) were used as synergistic fillers, fluorine/silicone composite rubber was prepared by mechanical mixing process, and three different fluorine rubber systems were used to find the best composite material. The mechanical properties, thermal properties, aging properties, moderate strength properties, and microstructure of the composites were evaluated. Studies have shown that mixing the two can produce a certain interface interaction and effectively improve the compatibility. The physical properties of the material tended to decrease during the increase in the added amount of silicone rubber (MVQ). The maximum tensile strength of the hybrid material can reach 15 MPa. The optimal mixing ratio is fluororubber/silicone rubber (FKM/MVQ) = 9/1. At this time, the mechanical properties of the composite material are in the best state, and SiO2 and black caron (N990) have a reinforcing effect, which can effectively improve the mechanical properties. After the composite was kept at 200 °C for 48 h, the tensile strength and elongation of the best sample A1 were 99.5 and 97.0%, respectively, showing excellent anti-aging properties. This work provides a method to fabricate high-strength fluorine/silicone composites using synergistic fillers that may be used in heat-medium-sealed environments.

show abstract

Section: Results and Discussionmentioning

confidence: 99%

Preparation of High-Strength and Excellent Compatibility Fluorine/Silicone Rubber Composites under the Synergistic Effect of Fillers

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Among them, the F atom in FKM with a relatively small radius can be closely arranged around the carbon atom and form a protective barrier for the C–C bond due to the strong electron-absorbing effect of the F atom. The narrowed length and increase in bond energy of the C–C bond would confer the fluorine-containing polymer elastomers with chemical inertia of the carbon chain, heat resistance, oxidation resistance, oil resistance, and other properties. − After blending with silicone rubber, the fluorine/silicone rubber composite material combines the advantages of silicone rubber and fluorine rubber, with good resistance to high and low temperatures and oil resistance, , while reducing the cost of use. However, because of the large difference in polarity between these two kinds of rubbers, the compatibility of fluorine/silicone phases is poor, which affects the blending effect and performance. , The addition of a third component compatibilizer might be a simple and effective way to achieve a more homogeneous fluorine/silicon blend system.…”

Section: Introductionmentioning

confidence: 99%

“…The narrowed length and increase in bond energy of the C–C bond would confer the fluorine-containing polymer elastomers with chemical inertia of the carbon chain, heat resistance, oxidation resistance, oil resistance, and other properties. 20 − 24 After blending with silicone rubber, the fluorine/silicone rubber composite material combines the advantages of silicone rubber and fluorine rubber, with good resistance to high and low temperatures and oil resistance, 25 , 26 while reducing the cost of use. However, because of the large difference in polarity between these two kinds of rubbers, the compatibility of fluorine/silicone phases is poor, which affects the blending effect and performance.…”

Section: Introductionmentioning

confidence: 99%

Fluorination Modification of Methyl Vinyl Silicone Rubber and Its Compatibilization Effect on Fluorine/Silicone Rubber Composites

Xing,

Yu,

Ding

et al. 2024

ACS Omega

View full text Add to dashboard Cite

Among numerous rubbers, high-performance rubber composites can be obtained by mixing fluororubber (FKM) with excellent oil resistance and silicone rubber (SiR) with excellent low-temperature resistance. While the difference in polarity between these two kinds of rubbers leads to a reduction in the properties of the composites. To solve the compatibility problem between the two-phase interfaces in FKM/SiR composites, in this research, fluorinated silicone rubbers (MVQg-PFDT) of methyl vinyl silicone rubber (MVQ) grafted with 1H,1H,2H,2H-perfluorodecanethiol (PFDT) were prepared via a facile and efficient thiol−ene click reaction, which was then added into FKM/SiR composites. The results showed that the fluorinecontaining side chains could effectively inhibit the low-temperature crystallization phenomenon of silicone rubber and further broaden its application ranges in low-temperature environments. The properties of FKM/SiR composites with the addition of MVQg-PFDT were significantly improved, with the highest tensile strength of 14.1 MPa and the lowest mass change rate of 6.71% after 48h immersion at 200 °C in IRM903 oil. Additionally, the hydroxyl groups between the fluorine-containing side chains of MVQ-g-PFDT and the surface of silica facilitate the enhancement of the uniform dispersion of fillers. Atomic force microscopy (AFM) characterization results showed a distinct enhancement of the compatibility between the two phases of FKM and SiR. This work would provide further insight into efforts to improve compatibility between rubbers with widely different polarities.

show abstract

“…[23] Moreover, the literature revealed that fillers such as silica, CaCO 3 , montmorillonite clay, graphene oxide have extensively used in fluoroelastomer and silicone rubber blend system. [24,25] However, minimal works are available regarding mixed fillers in this blend system, especially for carbon black and modified silica. Hence, the objective of the work is to reduce the carbon black content in the rubber composite system by replacing it with surface modified precipitated silica in a green approach to achieve the foremost physicomechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of partial substitution of carbon black with silica on mechanical, thermal, and aging properties of super specialty elastomer based composites

et al. 2020

View full text Add to dashboard Cite

The reduction of the carbon black quantity in elastomeric composites is a massive requirement from environmental perspective and a huge challenge for industrial implementation. The present work consists of the replacement of half amount of carbon black with silica without compromising the basic properties along with ushering of superior characteristics of fluoroelastomer and silicone rubber blends. The comparative study of carbon black-silica hybrid filler (1:1 ratio) with carbon black and silica at different loadings shows much superior aging behavior and thermal stability compared with the other composites with unforeseen increment of tensile strength (56%). The fundamentals of rubber-filler interaction and reinforcement phenomenon of the hybrid filler composites have been determined by the correlation of the experimental findings with different models like Nicolais-Narkis, Nielsen, Guth, and Kerner model. Furthermore, enhanced compatibility between the two rubber phases has been observed in terms of T g shifting (3.8 C) and reduced FKM domain size (from 450 to 300 nm) in the silicone rubber matrix for hybrid filler composites. Morphological studies reflect the selected homogeneous dispersion of the carbon black in fluoroelastomer domain and silica in silicone rubber phase. These super specialty elastomeric composites can be used as oil and fuel resistant gaskets and O-rings for wide temperature range.

show abstract

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

Cited by 12 publications

References 18 publications

Preparation of High-Strength and Excellent Compatibility Fluorine/Silicone Rubber Composites under the Synergistic Effect of Fillers

Preparation of High-Strength and Excellent Compatibility Fluorine/Silicone Rubber Composites under the Synergistic Effect of Fillers

Fluorination Modification of Methyl Vinyl Silicone Rubber and Its Compatibilization Effect on Fluorine/Silicone Rubber Composites

Influence of partial substitution of carbon black with silica on mechanical, thermal, and aging properties of super specialty elastomer based composites

Contact Info

Product

Resources

About