Stabilization efficiency of graphene in γ-irradiated styrene-isoprene-styrene copolymer

The stabilization efficiency of reduced graphene oxide (rGO) on the gamma-irradiated styrene-isoprene-styrene copolymer (SIS) matrix is studied by chemiluminescence. The relevant protection effects of polymer against oxidation are obtained, when the inorganic phase is present in low concentrations (1, 2 and 3 wt%). The values of the characteristic kinetic parameters of degradation, namely oxidation induction time (OIT) and onset oxidation temperature(OOT) keep their figures in respect with pristine polymer. The gamma-exposure of modified SIS probes to various doses up to 100 kGy demonstrates the appropriate ability of rGO to delay thermal and radiochemical oxidation. Because the oxidation strength increases as the rGO loading is greater, these stabilization formulations may be recommended as the appliable versions in the manufacture of long life polymer products. The coupling rGO with rosemary extract for the extension of polymer durability proves the favorable association between the two stabilization mechanisms: the interlayer scavenging shown by rGO and the proton substitution operated by the polyphenolic compounds existing in rosemary extract.

Automated summary

The stabilization efficiency of reduced graphene oxide (rGO) on the gamma-irradiated styrene-isoprene-styrene copolymer (SIS) matrix is studied by chemiluminescence. The results show that the presence of inorganic phase in low concentrations can protect the polymer against oxidation. The characteristic kinetic parameters of degradation remain unchanged compared to the pristine polymer. The study also demonstrates that rGO can delay thermal and radiochemical oxidation, especially at higher loadings. Coupling rGO with rosemary extract further enhances the durability of the polymer.