Thermal aging and automotive oil effects on the performance of electron beam irradiated styrene butadiene rubber/waste and microwave devulcanized rubber blends

Abstract

Replacement of virgin polymer with its waste become one of the special technique that capture the efforts of many researchers and industrialists alike. In this context, this work discussed the partial replacement of waste tire rubber (WR) and microwave devulcanized rubber (DWR) at different ratios on the properties of virgin styrene butadiene rubber (SBR) as one of the most essential components of synthetic rubber in the tire production. Fixed percent of tetramethylthiuram disulfide and spindle oil were added at the first, then the WR mixture was exposed to different microwave times. Microwave devulcanization value at time 6 min gave the highest devulcanization percent. The prepared blends were exposed in an electron beam accelerator (EB) at 50 and 100 kGy. FTIR, different mechanical parameters, thermal stability (TGA) and scanning electron microscopy of the fabricated specimens have been explained. Effect of automotive oil and thermal aging at different temperature, 70oC and 100oC on the tensile strength and elongation at break (E%) of the unirradiated and irradiated prepared blends have been estimated. Mechanical measurements of all examined specimens after thermal aging and oil immersion were least affected. Moreover, these factors before and after oil dipping and thermal aging revealed that unirradiated and irradiated SBR/DWR blends have superior properties than SBR/WR.

Recycled high-density polyethylene plastic reinforced with ilmenite as a sustainable radiation shielding material

“…6 shows typical stress–strain curves of pure r-HDPE and r-HDPE + x % Ilm composite sheets with varying concentrations determined at room temperature and a constant loading rate (500 mm min −1 ). 24,25…”

“…6 shows typical stress-strain curves of pure r-HDPE and r-HDPE + x% Ilm composite sheets with varying concentrations determined at room temperature and a constant loading rate (500 mm min −1 ). 24,25 To explore the inuence of dopant ilmenite concentration on the mechanical characteristics of r-HDPE, the tensile strength (MPa), elongation at break percent, and Young's modulus (MPa) of r-HDPE + x% Ilm composite sheets were investigated (Fig. 7).…”

Zn[B3O4(OH)3] composites fabrication based on PVC pipes scrap via comparing melt mixing and casting procedures under the effect of electron beam irradiation

“…Furthermore, the peak of the C-H stretching vibration at 2849 and 2919 cm À1 does not show differences between an unirradiated and irradiated WPVC/ZnB (M) significantly that the hydrocarbon backbone is not degraded by EB-irradiation. 15 16 Also, WPVC filled with zinc borate using the melting mixing method displays several peaks at 2 thetas 17.7, 18.0, 20.5, 21.7, 22.5, 23.7, 24.1, 25.8, 27.5, 28.6, 30.2, 30.5, 30.7, 32.8, 35.9, 36.6, and 42.9°r espectively, those characteristic spectra of 2 ZnO•3B 2 O 3 •3.5 H 2 O. 17 It was observed that peaks around 2 thetas 18.7 and 25.0 were less intense in comparison with those that represent the pristine WPVC because the addition of zinc borate decreases the crystalline phase on WPVC.…”

“…Furthermore, the peak of the C–H stretching vibration at 2849 and 2919 cm −1 does not show differences between an unirradiated and irradiated WPVC/ZnB (M) significantly that the hydrocarbon backbone is not degraded by EB-irradiation. 15…”

Polydopamine in‐situ polymerized on graphene oxide for nitrile butadiene rubber with high strength, elasticity and aging resistance

“…There are many methods to improve the performance of rubber, such as modification in the synthesis and processing progress, blending with plastic and other rubbers, 5 adding additives 6–8 and nanofillers 9–11 . Among the methods, the application of nanofillers in rubber has received widespread attention.…”