Fiber-Forming Properties of Poly(vinyl alcohol) Derived from Poly(vinyl pivalate).

Fiber-forming properties of poly (vinyl alcohol) s (PVAs) with high syndiotacticities (diad syndiotacticity=61-65%) derived from poly (vinyl pivalate) (PVP) were studied. PVA with moderate molecular weight (ca. 7×104), which was derived from PVP, showed a high fiber-formability and provided fibers having a high degree of crystallinity and a high mechanical strength. One the other hand, PVAs having fairly high molecular weights (>4×105) and having high syndiotacticities were less drawable owing to the strong intermolecular forces caused by the stereoregularity.