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Article

Elastomeric Composites Containing SBR Industrial Scraps Devulcanized by Microwaves: Raw Material, Not a Trash

1
Polytechnic School of Civil Engineering, IMED, Rua Senador Pinheiro, 304, 99070-220 Passo Fundo, Brazil
2
Technology Development Center, Universidade Federal de Pelotas, Rua Gomes Carneiro, 1, 96010-610 Pelotas, Brazil
3
Center of Engineering, Modeling and Applied Social Science, Universidade Federal do ABC, Avenida dos Estados, 5001, 09210-580 Santo André, Brazil
*
Author to whom correspondence should be addressed.
Recycling 2020, 5(1), 3; https://doi.org/10.3390/recycling5010003
Received: 29 December 2019 / Revised: 7 February 2020 / Accepted: 13 February 2020 / Published: 17 February 2020
Environmental concerns about waste management systems have stimulated the search for technological and economical alternatives that introduce waste as raw material for production cycles. In this sense, this study aimed to develop and characterize styrene-butadiene rubber (SBR) composites that contain industrial rubber scraps devulcanized by microwaves (SBR-r) as a reinforcing filler. The scraps were ground under ambient conditions. From the obtained powder (SBR-r), composites were prepared, varying the exposure time of the powder to the microwaves (1, 2, and 3 min), as well as the SBR-r content. These composites were compared to a Reference sample (base formulation without SBR-r). The vulcanization parameters were determined by an oscillating disk rheometer. After vulcanization, the composites were characterized by mechanical properties (tensile and tear strength, and compression set). These properties were also evaluated after accelerated aging in an air oven and a UV chamber (ultraviolet light). The results indicated that as a result of increasing the exposure time of the waste to the microwaves, no significant influence in the composite properties was observed. Aged samples presented higher results as compared with the Reference sample (tensile strength up to 175% higher, tear strength up to 107% higher, and compression set up to 91% higher), which indicates the possibility of using these materials in technological applications, such as in the civil and automotive industries. View Full-Text
Keywords: styrene-butadiene rubber (SBR); SBR industrial rubber scraps; devulcanization; microwaves; recycling styrene-butadiene rubber (SBR); SBR industrial rubber scraps; devulcanization; microwaves; recycling
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MDPI and ACS Style

Zanchet, A.; de Sousa, F.D.B. Elastomeric Composites Containing SBR Industrial Scraps Devulcanized by Microwaves: Raw Material, Not a Trash. Recycling 2020, 5, 3. https://doi.org/10.3390/recycling5010003

AMA Style

Zanchet A, de Sousa FDB. Elastomeric Composites Containing SBR Industrial Scraps Devulcanized by Microwaves: Raw Material, Not a Trash. Recycling. 2020; 5(1):3. https://doi.org/10.3390/recycling5010003

Chicago/Turabian Style

Zanchet, Aline, and Fabiula D.B. de Sousa 2020. "Elastomeric Composites Containing SBR Industrial Scraps Devulcanized by Microwaves: Raw Material, Not a Trash" Recycling 5, no. 1: 3. https://doi.org/10.3390/recycling5010003

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