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>Properties of syndiotactic‐rich poly(vinyl alcohol) thin film in water. V. Effect of initial temperature of heating on elongation
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Properties of syndiotactic‐rich poly(vinyl alcohol) thin film in water. V. Effect of initial temperature of heating on elongation
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机译：Properties of syndiotactic‐rich poly(vinyl alcohol) thin film in water. V. Effect of initial temperature of heating on elongation
AbstractThe effect of the initial temperature of heating on the elongation of syndiotactic‐rich poly(vinyl alcohol) thin films was investigated in water under a load. The elongation ratiosEiafter 4 h at fixed temperatures increased roughly with an increase in the initial temperatureTiand a decrease in the annealing temperature.Eiafter 4 h was the smallest atTi= 45°C for the films annealed at temperatures below 100°C.Eiwas 6.8 atTi= 60°C for the unannealed film and 1.12 atTi= 70°C for the film annealed at 200°C. The elongation at break decreased and the temperature at break increased with an increase in annealing temperature, but those at the annealing temperature of 100°C were the smallest. The films annealed at 200°C did not break even at 98°C (boiling temperature) in water and the elongation ratio was 1.42–1.97 in the initial temperature range of 10–70°C. From these results, the relation between the elongation in water and the state of polymer chains in film
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