THE PHYSICAL PROPERTIES OF PVA SPINNING DOPE IN THE MIXED SOLVENT OF DMSO AND WATER

摘要

To increase the tensile strength and modulus of polyvinylalcohol (PVA) fiber by utilizing polymer with medium molecular weight, several spinning techniques have been developed. Lots of researchers have been studied the characteristic rheological behavior of PVA/water and PVA/dimethyl sulfoxide(DMSO)/water systems. Cha et al.[1] succeeded in manufacturing high strength and high modulus PVA fibers by drawing gels prepared from DMSO/water mixture. Up to now, however, problems associated with applying these gel systems to the actual spinning processes still remains unsuccessful. Owing to the strong inter and intramolecular interactions, PVA exhibits very unusual Theological responses depending on measuring conditions and time scale of measurement. This study investigates the rheological properties of PVA solutions in DMSO containing water to assess the optimum spinning conditions.