Influência da mica nas propriedades mecânicas e dinâmico-mecânicas de composições de borracha natural

Escócio, Viviane Alves; Martins, Agnes F.; Visconte, Leila L. Y.; Nunes, Regina C. R.; Costa, Djanira M. R.

doi:10.1590/s0104-14282003000200012

Cited by 15 publications

(12 citation statements)

References 4 publications

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“…the number of cross-links formed during the vulcanization process. The relation between the maximum and minimum torque (∆M) define the degree of reinforcement from the filler incorporation [21] which is increasing in terms of the amount of SBA particles (0-40 phr) incorporated on the composites. Moreover, when incorporated the amount of 50 phr of SBA particles decrease the rate of mechanical reinforcement.…”

Section: Results E Discussionmentioning

confidence: 99%

Sugarcane bagasse ash: new filler to natural rubber composite

et al. 2014

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Waste recycling has been the subject of numerous scientific researches regarding the environmental care. This paper reports the redirecting of sugarcane bagasse ash (SBA) as new filler to natural rubber (NR/SBA). The NR/ SBA composites were prepared using an opened cylinder mixer to incorporate the vulcanization agents and different proportions of residue (SBA). The ash contains about 70-90% of inorganic compounds, with silica (SiO 2 ) being the main compound. The SBA incorporation improved the mechanical properties of the vulcanized rubber. Based on these results, a new use is proposed for the agro-industry organic waste to be implemented in the rubber vulcanization process, aimed at improving the rubber physical properties as well as decreasing the prices of natural rubber composites.

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Section: Results E Discussionmentioning

confidence: 99%

Sugarcane bagasse ash: new filler to natural rubber composite

et al. 2014

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“…These changes may adversely affect the reliability and long‐term performance of the materials, limiting their service life time. Thus, aging effects are important factors when considering both cost and quality 3–7…”

Section: Introductionmentioning

confidence: 99%

“…The subjects of accelerated aging and swelling of rubber composites are still open for discussion. Many researchers have studied the thermal aging behavior of conventionally filled rubber,5, 9–13 but data regarding the effect of vulcanized ground scraps on the aging resistance of rubber composites in the literature are limited 14–16…”

Section: Introductionmentioning

confidence: 99%

Accelerated aging of elastomeric composites with vulcanized ground scraps

Carli

Bianchi

Mauler

et al. 2011

J of Applied Polymer Sci

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The aim of this work is to study the effect of thermal aging on the mechanical, dynamic-mechanical, and chemical properties of SBR (styrene-butadiene rubber) composites filled with SBR industrial rubber scraps. Eight composites with varying proportions (10-80 phr) of the SBR ground scraps (SBR-r) were prepared and subjected to accelerated aging in an air-oven. The composites were evaluated, and the results were compared with a control sample (base formulation with 0 phr of SBR-r), before and after thermal aging. The accelerated aging led to a decrease in the mechanical properties as a result of an increase in the stiffness of the material, related to an increase in the crosslink density. However, these properties were not affected by the addition of rubber scraps up to 50 phr, either before or after aging. The increase in the glass transition temperature of the composites after aging, measured using dynamic mechanical analysis, confirmed the occurrence of a postcrosslinking process. Fourier transform infrared spectroscopy and crosslink density revealed that the aging mechanism was dependent on the SBR-r content.

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“…[6] In Brazil, rockformed muscovite mica is readily available and reasonably cheap. [7] Therefore, PET=muscovite mica composites may result in low-cost composites.…”

Section: Molecular Dynamics Of Poly(ethylene Terephthalate)/ Muscovitmentioning

confidence: 99%