The stabilization assisted by POSS nanoparticles embedded in styrene-isoprene-styrene triblock copolymer

Abstract

Various substituents (– CH3, – OCH3, – F, – Cl) placed in polyhedral oligomeric silsequioxane (POSS) structure influence the stability of styrene-isoprene-styrene block copolymer (SIS) hybrids by the electronic interaction on the surface of the particle. The chemiluminescence investigation on the oxidability of these samples allows the characterization of the interaction between the radiolysis polymer fragments and the tetrahedral configuration broken by γ-irradiation. The modified POSS structures mitigate the evolution of oxidation, because the penetration of free radicals is controlled by the substituent action on the penetration of radical into the free space of POSS structures rather than their oxidation. in the degrading polymer material. The evaluated protection activities of modified POSS structures are characterized by the values of the activation energies required for the improvement in the extended stability based on the oxidation induction times, as well as the slowing down of the oxidation rates at the degradation temperature exceeding 170 °C. The substituents play the role of moderators in the scavenging of polymer fragments by their ability to influence the efficiency of cage withdrawing of free radicals from the degradation chain. These SIS hybrids represent the appropriate versions of fillers that may minimize the development of ageing in degrading products and waste recycling. The study intends to demonstrate that a crystalline compound can extend material durability simultaneously with the improvement of functional ability due to the interaction on the particle surface.