Abstract
Isotropic polvinyl alcohol filaments were stretched to various degrees in different media.
For the stretched filaments, the tensile strength and elongation were measured in both wet and drv states.
Shrinkage was also observed in gradually heated water.
The changes of filament length at the softening point and at the solubility point were calculated from the standard length.
This has led to the conclusion that the softening point can be characterized as the point at which Young's modulus becomes very low.
Since the filament length at solubility point corresponds to the length at the effective draw, some frame-work structure must be considered in the inner part of the filament.
The shape of shrinkage curves can be interpreted qualitatively considering the distribution of secondary bond strength.
