Rheological properties and curing features of natural rubber compositions filled with fluoromica ME 100

Honorato, Luciana Ribeiro; Dias, Marcos L.; Azuma, Chiaki; Nunes, Regina C. R.

doi:10.1590/0104-1428.2352

Cited by 22 publications

(14 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to the theory of the Payne effect, low deformations are related to rubber-filler interactions and the high deformation to the filler‒filler ones [27]. The greater the ΔG′, the greater the Payne effect, indicating a greater breakdown of filler‒filler interaction, and the greater the amount of clusters present in the elastomeric matrix [28]. The Payne effect measurements were conducted up to 40–100% of strain.…”

Section: Resultsmentioning

confidence: 99%

Natural Rubber Composites Filled with Crop Residues as an Alternative to Vulcanizates with Common Fillers

Masłowski

Strzelec

2019

Polymers

View full text Add to dashboard Cite

This present study is focused on exploring the possibility of using agricultural waste in the form of cereal straw as an active filler of biocomposites. The effect of lignocellulosic filler addition on the multifunctional properties of natural rubber composites was investigated. The results were compared with the properties of vulcanizates containing commonly used reinforcements in elastomer technology (carbon black, silica, chalk, talc). Rubber mixtures filled with straw showed the highest torque increase during rheometric measurements, which indirectly indicated a high degree of crosslinking and hardness of composites. It was found that the effect of straw addition on vulcanization time of elastomer blends was comparable with the results obtained for other conventional fillers. Moreover, the results confirmed that novel composites based on natural rubber filled with crop residues were attractive materials owing to their capacity for the formation of “structure” in combination with a good impact on reinforcement. Vulcanizates with the addition of straw showed the best barrier properties and resistance to thermo-oxidative aging from all tested samples. Furthermore, straw-based composites demonstrated that cereal straw waste could be used as an alternative, biodegradable and eco-friendly reinforcement of natural rubber composites.

show abstract

Section: Resultsmentioning

confidence: 99%

Natural Rubber Composites Filled with Crop Residues as an Alternative to Vulcanizates with Common Fillers

Masłowski

Strzelec

2019

Polymers

View full text Add to dashboard Cite

show abstract

“…It can be seen that, with increasing TC content (curves 2-5), an increase in torque S' is observed, indicating the interaction of the TC with the matrix and with the other ingredients of the elastomeric mixture. Taking into account that the difference between the maximum and minimum torque ( -) characterizes the crosslinking density of the vulcanizate [19,20], it can be noted that the introduction of TC leads to the formation of a denser spatial mesh of the vulcanizate. Table 2 shows that, upon introduction of 20 wt % TC, the difference between the torques is 12.85 dN m, which is 4.13 dN m more than with unfilled regenerate.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Electrically Conductive Rubber with Positive Temperature Coefficient of Resistance from Tire Regenerate

Shadrinov

Antoev

2021

Inorg. Mater. Appl. Res.

View full text Add to dashboard Cite

The possibility of developing conductive rubber based on tire regenerate and conductive carbon black OMCARB CH85 is shown. The vulcanizing characteristics of the regenerates obtained by thermomechanical devulcanization using a curing group and conductive carbon black were studied. It is shown that, after thermomechanical devulcanization, a re-vulcanization due to preservation of sulfide bonds occurs only in the presence of sulfur and vulcanization accelerators. A flocculation effect was found upon the introduction of OMCARB CH85 into the regenerate. It is shown that tensile strength and Shore A hardness are increased with an increase in the content of conductive carbon black in the regenerate. However, owing to insufficient dispersion, the carbon black admixture exceeding the optimum quantity results in a decrease in maximum relative elongation at break and diminished resistance to abrasion is observed. The study of the volume resistivity showed that the rubbers obtained belong to semiconductor materials. The dependence of resistivity on temperature in the range from 10 to 80°C is plotted. It is shown that the effect of a positive thermal coefficient is observed in all samples. The values of the positive temperature coefficient of resistance in the temperature range of 10-80°C are 0.054-0.285 K -1 .

show abstract

“…Dynamic mechanical analysis (DMA) was studied with the application of ARES Rheometer (plate-plate system, plate diameter: 20 mm; gap 2 mm). Dynamic mechanical measurements parameters: temperature: 25 ∘ C, sample deformation rate: 10 rad/s, stress: from 0.1% to 150%, test force: 5 N. The Payne effect (ΔG ) values of the composites have been calculated based on the equations (2) [33].…”

Section: Methodsmentioning

confidence: 99%

Reinforced, Extruded, Isotropic Magnetic Elastomer Composites: Fabrication and Properties

Masłowski

Miedzianowska

Strzelec

2019

Advances in Polymer Technology

View full text Add to dashboard Cite

The study involves the development of isotropic magnetorheological elastomer composites (i-MREs) with improved mechanical properties, their preparations, and properties characterizations. The novelty of the research is the use of extrusion process in the preparation of composites containing two different fillers: carbonyl iron powder (CIP) as magnetic filler and carbon black (FEF, N550) as reinforcing one. So far, the process of extrusion has been used to prepare magnetic composites without filler that improve mechanical properties. It is worth mentioning that the polymer matrix (ethylene-octene copolymer, EOR) offers excellent performance in extrusion applications. In this research, two methods of magnetic composites preparation were reported: traditional, during two-roll mill, and a new one using extrusion process. It was found that the usage of new processing technology allowed forming more homogenous dispersion of particles in elastomer matrix and oriented polymer chains, resulting in an improved rheometric characteristic, increased crosslink density, and decrease of the storage modulus (Payne effect). Based on both static/dynamic mechanical properties and damping properties under the influence of compression stress, the positive influence of extrusion process on material characteristics was confirmed. Moreover, all composites proved very good magnetic properties and resistance to thermooxidative ageing.

show abstract

Rheological properties and curing features of natural rubber compositions filled with fluoromica ME 100

Cited by 22 publications

References 25 publications

Natural Rubber Composites Filled with Crop Residues as an Alternative to Vulcanizates with Common Fillers

Natural Rubber Composites Filled with Crop Residues as an Alternative to Vulcanizates with Common Fillers

Electrically Conductive Rubber with Positive Temperature Coefficient of Resistance from Tire Regenerate

Reinforced, Extruded, Isotropic Magnetic Elastomer Composites: Fabrication and Properties

Contact Info

Product

Resources

About