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Properties of syndiotacticity‐rich poly(vinyl alcohol) thin film in water. I. Effect of the load on the extension of untreated thin film in water
Author(s) -
Yamaura Kazuo,
Matsuzawa Shuji
Publication year - 1984
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1984.070291233
Subject(s) - thin film , vinyl alcohol , elongation , materials science , modulus , composite material , ultimate tensile strength , atmospheric temperature range , polymer chemistry , polymer , thermodynamics , nanotechnology , physics
The effect of the load on the extension of untreated thin film of syndiotacticity‐rich poly(vinyl alcohol) (PVA VTFA ) 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 PVA VTFA film in water at 25°C was about 4.8 × 10 −4 GPa. The maximum elongation of PVA VTFA film in water at 25°C is achieved for a short time under high load, whereas not under low load. The expansion of PVA VTFA 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 T b is in the range of 70–90°C and increasing load roughly tends to decreasing T b . The elongation at break decreased with the increase in load.