Formation of boundary lubricating films during friction in synthetic oil modified with naphthalene derivatives

The influence of additives of naphthalene derivatives on the formation of boundary lubricating layers during friction in a dioctyl sebacate synthetic oil is considered. It is determined, that the activity of the additives is determined by the presence of acidic groups in their molecules and the ability to form complex compounds with metals. Keywords: boundary film, dioctyl sebacate, naphthalene derivatives, complex formation, lubricating properties [email protected]

STUDY OF THE EFFECT OF DIOCTYL SEBACATE ON THE PROPERTIES OF EPICHLOROHYDRIN RUBBERS

The effect of different technologies for the introduction of a plasticizer - dioctyl sebacate on the properties of rubbers based on epichlorohydrin rubber of the Hydrin T-6000 brand was investigated. When using the technology of rubber swelling in a plasticizer, dioctyl sebacate exhibits a shielding effect, reducing the interaction of the filler-polymer, which leads to an improvement in low-temperature properties and a deterioration in the physical and mechanical properties of the material.

Investigation of the effect of plasticizer injection technology on the properties of epichlorohydrin rubbers

The influence of preliminary swelling of epichlorohydrin rubber of the brand is investigated Hydrin Т6000 in dioctyl adipate and dioctyl sebacate on the Physicomechanical characteristics and frost resistance of its vulcanizates. Revealed that pre-swelling of the rubber in the plasticizer, the plasticizer penetrates into the intermolecular space of the rubber and due to the shielding effect reduces the interaction of the filler with the elastomer matrix, which simultaneously leads to improved low-temperature properties and decrease of Physicomechanical properties of vulcanizates.

Simulation of GAP/HTPB phase behaviors in plasticizers and its application in composite solid propellant

Dissipative particle dynamics and molecular simulations were carried out to investigate the phase behaviors of glycidyl azide polymer (GAP)/hydroxyl-terminated polybutadiene (HTPB) polymer blend in dioctyl sebacate (DOS), and mixture of DOS and bis(2,2-dinitropropyl)formal/acetal (A3), respectively. The rheology of GAP/HTPB propellant slurry plasticized by A3/DOS was studied. First, single-phase aggregations of GAP and HTPB appear slightly in A3/DOS whereas it is conspicuous in DOS, which results from the small surface tension between the GAP/HTPB plasticized by A3/DOS and the weak thermal diffusion of this blend. Furthermore, with the plasticizing ratio (po/pl) increasing to 1.2, the GAP/HTPB propellant slurry plasticized by A3/DOS exhibits small viscosity and yield stress, and the Newtonian-like behavior of slurry improves its manufacturability. Finally, integral GAP/HTPB-based propellant can be obtained using A3/DOS as plasticizers.

Investigation of the effect of some organic compounds on the formation of an antifriction film in a dioctyl sebacate medium

The influence of addition of malonic acid, diethylmalonate and acetylacetone to dioctylsebacate on the process of antifriction film formation is studied. It was found that the addition of small amounts of diethylmalonate and acetylacetone contributes to the acceleration of the tribosystem output to the regime. The addition of malonic acid slows down the process of forming an anti-friction film. The results suggest that the coordination iron compounds are involved in the process of antifriction film formation.