A sustainable molding process for new rubber products from tire recycling

Quadrini, Fabrizio; Santo, Loredana; Musacchi, Ettore

doi:10.1177/1477760618798274

Cited by 15 publications

(12 citation statements)

References 34 publications

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“…High temperature and pressure also enhanced the sintering of GTR particles without using additional additives [ 41 , 42 ]. This is related to the combined effects of the devulcanization, degradation, and secondary vulcanization (revulcanization) of GTR (or GTR with NBR) supported by free radicals’ reactions.…”

Section: Resultsmentioning

confidence: 99%

GTR/NBR/Silica Composites Performance Properties as a Function of Curing System: Sulfur versus Peroxides

et al. 2021

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In this work, conventional sulfur and two types of organic peroxides (dicumyl peroxide (DCP) and di-(2-tert-butyl-peroxyisopropyl)-benzene (BIB)) curing systems were used to investigate the possibility for tailoring of the performance properties of GTR/NBR blends reinforced with a variable content of highly dispersive silica (0–30 phr). The curing characteristics, static mechanical and acoustical properties, swelling behavior, thermal stability, and microstructure of the prepared composites were investigated. The results show that regardless of the curing system used, increasing the content of highly dispersive silica resulted in the improvement of the mechanical properties of the studied materials. It was observed that sulfur-based systems are the best choice in terms of cross-linking efficiency determined based on torque increment and cross-link density parameters. However, further analysis of the physico-mechanical properties indicated that the cross-linking efficiency does not match the performance of specimens, and the materials obtained using organic peroxides show higher tensile properties. This is due to the improved physical interactions between the GTR/NBR matrix and highly dispersive silica when using peroxide systems. It was confirmed using the analysis of the Wolff activity coefficient, indicating the enhanced synergy.

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Section: Resultsmentioning

confidence: 99%

GTR/NBR/Silica Composites Performance Properties as a Function of Curing System: Sulfur versus Peroxides

et al. 2021

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“…The simpler methods are their use as inert filler for constructions [5,6] and as road asphalt [7] or for the direct production of raw materials such as rubber [8][9][10] and textiles [11]. Alternatively, thermochemical routes are cost-effective approaches for end-life tires treatment avoiding the complexity of alternative management routes [12] such their conversion through pyrolytic techniques [13,14].…”

Section: Introductionmentioning

confidence: 99%

Catalytic oxidative desulphurization of pyrolytic oils to fuels over different waste derived carbon-based catalysts

Tamborrino

Costamagna

Bartoli

et al. 2021

Fuel

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In this work, we reported the conversion though carbothermal process of two catalysts produced by pyrolyzing exhausted coffee and waste tires. We tailored the surface with anchored iron nanoparticles through a facile carbothermal route and tested them for catalytic oxidative desulphurization of high sulphur content oil derived from tires pyrolysis. We studied their activity in a biphasic system under different conditions reaching a desulphurization of up to of 60% by using an oil with a sulphur concentration of up to 7139 ppm. The extensive characterization proved the reliability of those materials as promising catalysts for upgrading of sulphur rich drop-in fuels.

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“…The maximum average stress and strains are 2.6 MPa and 330%, respectively. Even if these values are lower than virgin rubber compounds, they are significantly higher than previously adopted reclaimed compounds for RU-FREIs [8,12]. A tear resistance of 6.94 N/mm was measured, which is lightly lower than the minimum requirements, i.e.8 N/mm [20].…”

Section: Novel Rubber Compound Investigationmentioning

confidence: 90%

“…Another method to obtain a 100% recycled rubber material consists in compression moulding of rubber granules at elevated temperature and pressure, necessary to break the crosslink bond, without the addition of any binder [9][10][11]. This material exhibits good mechanical properties and high density [12]. Some studies have shown the possibility of using rubber pads to produce recycled rubber isolators reinforced with carbon fibres (RU-FREI) avoiding the vulcanization process [13].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Characterization of a Reclaimed Rubber Compound for Low-Cost Elastomeric Isolators

Cilento¹,

Losanno²,

Piga³

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Although seismic isolation devices are effective in protecting structures during an earthquake, they are generally large, heavy, and expensive, making their application prohibitive for housing buildings. In the last few years, different strategies have been investigated to make seismic isolators cheaper and lighter for housing buildings in developing countries. Lower costs can be obtained at different scales: simplifying the installation process of devices, reducing energy consumption during manufacturing, and using recycled materials. Both weight and cost of isolators could be reduced by adopting flexible reinforcements in place of steel reinforcing plates, also allowing easier installation without bolted connections in unbounded configuration. Costs can be further reduced by replacing natural rubber with a recycled elastomer. It has been demonstrated that trying to give a second life to rubber is challenging, since devulcanization process, capable of breaking chemical bonds between rubber and sulphur, is highly polluting and requires high consumption of energy. In the present work, a recycled compound has been preliminary developed with mechanical properties not significantly lower than virgin rubber. Obtained parameters are satisfactory for use in unbounded isolators with flexible internal reinforcement where internal stresses are significantly reduced. In particular, a novel compound has been properly formulated in order to be lower cost in comparison to traditional one. Mechanical characterization of the material showed excellent properties including shear modulus and hardness similar to those of a soft rubber, even if a reduced ultimate deformation capacity is achieved. Furthermore, rubber adhesion with different fabrics has been investigated. Preliminary results are very promising and pave the way for the development of high-performance and low-cost rubber isolators.

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A sustainable molding process for new rubber products from tire recycling

Cited by 15 publications

References 34 publications

GTR/NBR/Silica Composites Performance Properties as a Function of Curing System: Sulfur versus Peroxides

GTR/NBR/Silica Composites Performance Properties as a Function of Curing System: Sulfur versus Peroxides

Catalytic oxidative desulphurization of pyrolytic oils to fuels over different waste derived carbon-based catalysts

Laboratory Characterization of a Reclaimed Rubber Compound for Low-Cost Elastomeric Isolators

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