Abstract
AbstractThe effect of the load on the extension of untreated thin film of syndiotacticity‐rich poly(vinyl alcohol) (PVAVTFA) derived from vinyl trifluoroacetate was examined in water. The untreated thin film obeys Hooke's law under a certain constant load at 25°C. Young's modulus of untreated PVAVTFA film in water at 25°C was about 4.8 × 10−4 GPa. The maximum elongation of PVAVTFA film in water at 25°C is achieved for a short time under high load, whereas not under low load. The expansion of PVAVTFA thin film by the elevation of temperature of water occurs mildly in the range of temperature of 45–55°C under low load, whereas not under high load. The temperature at break Tb is in the range of 70–90°C and increasing load roughly tends to decreasing Tb. The elongation at break decreased with the increase in load.
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