Influence of natural exposure on castor oil based polyurethane reinforced with waste tire rubber

Silva, Nycolle G. S.; Cortat, Lucas I.C.O.; Teixeira, Ericson J. O.; Baptista, Leonardo; Orlando, Diego; Mulinari, Daniella Regina

doi:10.1016/j.wasman.2022.11.004

Cited by 7 publications

(7 citation statements)

References 62 publications

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“…The obtained wet white solid was dried under vacuum at 80 °C for 48 h to obtain the cross-linker as a creamcolored solid (3.75 g, 65%; melting point: 105 °C). 1 H NMR (500 MHz, CDCl 3 ) δ 6.28 (s, 2H), 5.63 (s, 2H), 4.65 (t, J = 6.1 Hz, 4H), 3.23 (t, J = 6.1 Hz, 4H), 1.96 (s, 6H), 1.50 (s, 18H). 13 C NMR (126 MHz, CDCl 3 ) δ 166.…”

Section: Methodsmentioning

confidence: 99%

“…This is why millions of tons per year of used rubber tires, which are cross-linked polymeric materials, are landfilled, incinerated, or lost in the environment. 1 Thus, while effective recycling of thermoplastic polymers has, at best, been met with limited success, [2][3][4] the inherent non-recyclability of thermosets presents major environmental and economic challenges.…”

Section: Introductionmentioning

confidence: 99%

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Reprocessable, creep-resistant covalent adaptable networks synthesized using conventional free-radical polymerization conditions with piperidine-based and non-piperidine-based dynamic dialkylamino disulfide chemistry

et al. 2023

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reprocessable, creep-resistant covalent adaptable networks synthesized using conventional free-radical polymerization conditions with piperidine-based and non-piperidine-based dynamic dialkylamino disulfide chemistry

et al. 2023

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“…Thus, the use of PUR with tire rubber reinforcement can be a viable and sustainable alternative to produce more resistant and durable materials, with the potential to reduce the amount of waste generated. 19,20 Few works in the literature use sustainably sourced PUR and polyisocyanurate (PIR) as a matrix to produce composites reinforced with tire rubber. Despite having the same derivation, their different proportions of isocyanate make them different.…”

Section: Introductionmentioning

confidence: 99%

“…Due to its higher hardness and elasticity than standard rubber, tire rubber has great reinforcing potential. Silva et al 19 investigated the addition of waste tires and rubber to improve the mechanical and thermal properties of PUR, obtaining positive results. Thus, the use of PUR with tire rubber reinforcement can be a viable and sustainable alternative to produce more resistant and durable materials, with the potential to reduce the amount of waste generated 19,20 …”

Section: Introductionmentioning

confidence: 99%

Polyurethane‐polyisocyanurate (PUR‐PIR) foams based on castor oil modified with tire rubber waste: Statistical‐based analysis

Saboia,

da Silva,

Monteceli

et al. 2024

Polymer Engineering & Sci

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This study explores the utilization of bio‐polyol, derived from castor oil modified with waste tire rubber (WTR), in the synthesis of rigid polyurethane–polyisocyanurate foams. Two WTR concentrations (10% and 20%) were incorporated, investigating their impact on foaming, cellular structure, and various foam properties. Response surface methodology assessed the influence of polyol/isocyanate ratios and WTR content on thermal, physical, and mechanical responses. Results indicated significant effects of polyol/isocyanate ratios on thermal and density properties, while WTR content exhibited an opposite trend. Mechanical behavior showed a distinct pattern compared to thermal and physical aspects, suggesting no conclusive correlation between compressive stress variability and polyol/isocyanate ratio or WTR content. Consequently, the application of these foams depends on specific property requirements, highlighting the potential of sustainable bio‐polyols and recycled WTR in replacing conventional petroleum‐based counterparts in polyurethane foam production.Highlights Development of rigid polyurethane–polyisocyanurate foams based on castor oil. Polyurethane–polyisocyanurate foams modified with waste tire rubber. Increased isocyanate index impacts thermal stability and density. Response surface methodology showed variability in compressive stress behavior and the polyol/isocyanate ratio. For application of polyurethane–polyisocyanurate foams will depend on the desired properties.

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“…Another sustainable focus in the production of polyurethanes is their modification with recycled components, such as eggshell biowaste, waste tire rubber, etc. [ 6 , 7 ]. Such an approach increases the possibility of reducing the price of polyurethane composites, improving their performance and inducing waste utilisation [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Different Ratios of Lignin Waste and Liquid Glass on the Performance Characteristics of Biopolyurethane Foams

et al. 2023

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In the current study, biopolyurethane foam was modified with 2.5–10 wt.% lignin waste (LigW) and liquid glass (LG)-modified LigW particles at different LigW/LG ratios—1:1 and 1:2—and their impact on performance characteristics—i.e., rheology, foaming times, apparent density, thermal conductivity before and after aging, dimensional stability at ambient and elevated conditions, compressive and tensile strengths, short-term water absorption by partial immersion, and water vapor permeability—was determined and evaluated. Structural analysis was implemented and structural parameters were taken into consideration as well. During the study, it was determined that 2.5–10 wt.% particles at the LigW/LG ratio of 1:2 showed a superior impact on the physical and mechanical properties of bioPUR foams. The apparent density only insignificantly increased and was in a density range suitable for commercially available polyurethanes. For particles at 10 wt.% and LigW/LG ratio of 1:1, the thermal conductivity value improved by 3.2%, the compressive strength increased by 153%, while the tensile strength improved by 23.5%, indicating sufficient interfacial adhesion between the filler and polymer matrix. Moreover, the short-term water absorption by partial immersion remained almost unchanged, while the water vapour diffusion resistance factor improved from 43 to 48. Additionally, the incorporation of LigW/LG 1:1 and LigW/LG 1:2 particles made it possible to obtain dimensionally and structurally stable closed-cell bioPUR foams for possible application as thermal insulation in building envelopes.

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Influence of natural exposure on castor oil based polyurethane reinforced with waste tire rubber

Cited by 7 publications

References 62 publications

Reprocessable, creep-resistant covalent adaptable networks synthesized using conventional free-radical polymerization conditions with piperidine-based and non-piperidine-based dynamic dialkylamino disulfide chemistry

Reprocessable, creep-resistant covalent adaptable networks synthesized using conventional free-radical polymerization conditions with piperidine-based and non-piperidine-based dynamic dialkylamino disulfide chemistry

Polyurethane‐polyisocyanurate (PUR‐PIR) foams based on castor oil modified with tire rubber waste: Statistical‐based analysis

Impact of Different Ratios of Lignin Waste and Liquid Glass on the Performance Characteristics of Biopolyurethane Foams

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