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>Formation of 2,4‐dinitrophenylhydrazone on surface zone of polystyrene film irradiated by ultraviolet light. I. Effects on formation of 2,4‐dinitrophenylhydrazone
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Formation of 2,4‐dinitrophenylhydrazone on surface zone of polystyrene film irradiated by ultraviolet light. I. Effects on formation of 2,4‐dinitrophenylhydrazone
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机译：Formation of 2,4‐dinitrophenylhydrazone on surface zone of polystyrene film irradiated by ultraviolet light. I. Effects on formation of 2,4‐dinitrophenylhydrazone
AbstractThe hydrazones of the acetophenone‐type 2,4‐dinitrophenyihydrazone, formed by the reaction between 2,4‐dinitrophenylhydrazine and carbonyl groups, was formed on the surface zone of irradiated polystyrene film. The changes in the amount of hydrazones formed on the films were inferred by comparing the absorptions in the ultraviolet and infrared spectra. The amounts of hydrazones formed increased with increase in irradiation time within about 3 hr and approached an asymptote with increase in irradiation time upward of about 4 hr. For the samples irradiated for 6 1/2 hr, the changes in the absorptions of the hydrazones stopped in about 3 min after the films were immersed in the 2,4‐dinitrophenylhydrazine solution, the amounts of hydrazones formed increased with increase in the amount of benzene in the 2,4‐dinitrophenylhydrazine solutions, the amounts of hydrazones formed slightly increased with rising temperature below 60°C in the solutions, and the rate of increase slightly increased with rise in temperature above 60°C in th
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