Abstract: This paper presents an experimental investigation of two types of aliphatic hydrocarbons resistant soft PVC hoses. A number of tests were performed to determine the internal structures and the difference between the hoses. First tests concerned with pentane resistance, the plasticizer and extender’s effects on variations in the structure. The solubility of gas in plasticizer and the changing of morphology determined the applicability. The second analysis of FTIR results can show the internal structure’s composition, what the difference is between the two formulations. The weight changes of the hoses can shows the material’s gas resistance. The gas diffusion’s driving force was the gas evaporation. The gas diffusion can be determined from the decrease of the quantity of the hydrocarbons. The internal structure was also observed by DMA. The measurement was made after a pentane soak of simple samples. The morphology, the material’s density, mechanical properties and aliphatic hydrocarbon resistance of samples were determined. After all the measurements, the difference between the products was noticeable during even visual inspection of the samples as well.
Keywords: PVC hose, FTIR, DMA, gas diffusion, aliphatic hydrocarbon resistant.
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