The influence of composite component perlite DPh-Zn, that is the waste of oil refining industry, on the formation of properties complex of rubber mixes and their vulcanizates on the basis of apolar cis-1,4-polyisoprene and butadiene-nitrile rubbers of various polarity has been investigated. It has been established that perlite DPh-Zn is the effective vulcanization active component of multifunctional action capable at 10.0 mass frac. concentration to replace in full or in part traditional accelerators, vulcanization activators, stabilizers, and can be recommended for use in industrial elastomeric compositions for rubber goods manufacturing.

The sorption-diffusion properties of rubbers in contact with fuels containing methyl esters of fatty acids derived from non-food raw materials have been studied. The hypothesis was advanced according to which there is a dependence of oil resistance of rubbers on their solubility parameter of butadiene-nitrile rubber. The properties of standard oil-resistant rubbers based on butadiene nitrile rubbers of SKN-18 and SKN-40 brands were compared with those of SKN-18-based rubber and Byprene 110 chloroprene-based rubber, to each of them 30% of the plasticized polyvinyl chloride was added. It was found that the contact with the fuel composition, which consists of 70% diesel fuel and 30% methyl esters of fatty acids made from technical sunflower oil, has the strongest destructive effect on all experimental samples of rubber except for rubber-based rubber of SKN-40 brand. It was determined that SKN-40-based rubber, which is characterized by the maximum solubility parameter, is the most stable in relation to fuel compositions containing methyl esters of fatty acids of various origins. Based on the analysis of experimental data, the recommendations were given for the use of SKN-40-based rubber for the manufacture of car engine seals within the global trend to increase the share of alternative components in diesel fuels.

The process of degradation of biodiesel of vegetable origin (rapeseed and sunflower) under the influence of various factors is considered. Existing methods of determining microbiological contamination of substances are analyzed, their main advantages, disadvantages, and limits of use are determined. Based on the combination of existing methods, a method of qualitative and quantitative determination of the degree of microbiological (bacterial and mycological) damage to fuels has been developed. Quantitative and qualitative characteristics of microbiological damage to traditional and alternative diesel fuels have been established. The microorganisms that are the most active destructors of biofuels have been identified.

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Розглянуто властивості метилових ефірів курячого жиру як компонента сумішевих дизельних палив. Визначено вплив біодизельного палива на густину, в'язкість, фракційний склад дизельного палива. Показано, що названі показники сумішевих дизельних палив знаходяться в межах норм стандарту.Ключові слова: біодизельне паливо, фракційний склад, густина, в'язкість.Methyl ether of chicken fat properties are reviewed from the perspective to use it as a component of mixed biodiesel fuel. The influence of biodiesel fuel upon density, viscosity and fractional composition of diesel fuel is determined. The fact that mentioned characteristics of mixed diesel fuels are within allowances of the standart is proved.