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- W2071654924 abstract "High temperature polycondensation in solution has been used to obtain homo- and mixed polyarylates containing sulphur with various concentrations of the sulphur containing fragment, introduced into the polymer by using both 4,4′-dihydroxydiphenylsulphide and also the acid chloride of 4,4′-dicarboxydiphenylsulphide. The influence of the structure of the mixed polyarylates on their properties has been investigated. The strength properties of the initial and the heat treated specimens have been studied. It has been shown that a considerable increase in tensile strength is observed after films have been heated for 1 hr at 200°C. The ways in which the temperature dependence of the relative change in tensile strength and elongation at fracture depend on the concentration of the sulphur containing fragment has been investigated. The results of an investigation of thermal degradation in vacuum have shown that intense evolution of gaseous degradation products (carbon monoxide and dioxide) begins at 400°C. The appearance of hydrogen sulphide in the degradation products of the polyarylate is appreciable only at the temperature of 500°C." @default.
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- W2071654924 date "1980-01-01" @default.
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- W2071654924 title "Synthesis and investigation of the properties of some polyarylates containing sulphur" @default.
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- W2071654924 doi "https://doi.org/10.1016/0032-3950(80)90385-8" @default.
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