Abstract
Current regulations demand tires with long lifetime and reduced fuel consumption without sacrificing car safety. However, tire technology still needs to reach a suitable balance between these three indicators. Here, we address them by developing a self-healing tire compound using styrene–butadiene rubber (SBR) as the matrix and reclaimed tire waste as the sustainable filler. The addition of ground tire rubber (GTR) to the matrix simultaneously improved the rolling resistance and maintained both wet grip and healing ability. We provide an in-depth analysis of the healing behavior of the material at a scale close to the relevant molecular processes through a systematic dynamic-mechanical and dielectric analysis. We found that SBR and SBR/GTR compounds show a complete recovery of stiffness and relaxation dynamics after being damaged by cyclic deformation, resulting in a heterogeneous repaired rubber network. This new development could well overcome the so-called magic triangle of tires, which is certainly one of the key objectives of the tire industry.
Highlights
One of the most serious environmental problems facing society today is the accumulation of a great quantity of used tires in landfill sites, and the increasing automotive production over the years is continuously aggravating it [1]
The observed increase in E0 for the styrene–butadiene rubber (SBR)/ground tire rubber (GTR) compounds with respect to the unfilled SBR matrix can be attributed to two factors
We attempt to comprehend the changes in structure and dynamics related to SBR compounds filled with GTR under three different conditions: virgin, damaged by cyclic deformation, and thermally healed
Summary
One of the most serious environmental problems facing society today is the accumulation of a great quantity of used tires in landfill sites, and the increasing automotive production over the years is continuously aggravating it [1]. Recycling and recovering used tires can be considered reasonable strategies to solve this concern. Some limitations have to be defeated, since a tire is composed of various materials and additives incorporated in the rubber compound, turning it into a very complex system [2,3]. The recycling of waste tires has important implications in energy conservation, environmental protection, costs reduction, and in promoting the “4R” principle (Re-use, Reduce, Recycle, and Recover) [2,5,6]. Floors and walkway tiles, concrete mixtures [8], asphalt mixtures [9], thermal and acoustic isolation, and footwear, among others, are traditional fields of application of ground tire rubber (GTR)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
