Properties of syndiotactic-rich poly(vinyl alcohol) thin film in water. V. Effect of initial temperature of heating on elongation

✍ Scribed by Kazuo Yamaura; Tatsuaki Masuzawa; Tetsuya Tanigami; Shuji Matsuzawa

• Publisher: John Wiley and Sons
• Year: 1988
• Tongue: English
• Weight: 393 KB
• Volume: 35
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1988.070350304

✦ Synopsis

The effect of the initial temperature of heating on the elongation of syndiotactic-rich poly(viny1 alcohol) thin films was investigated in water under a load. The elongation ratios Ei after 4 h at fixed temperatures increased roughly with an increase in the initial temperature q and a decrease in the annealing temperature. E, after 4 h was the smallest at Ti = 45°C for the films annealed at temperatures below 100°C. Ej was 6.8 at = 60°C for the unannealed film and 1.12 at Ti = 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 was discussed.