Abstract
Specific gravities of pure PVC-fibers drawn to several multiple drawn ratio were measured at 30°C. These were in linear correlation with the drawn ratio, L, within experimental range. And from these data, relative crystallinity was obtained.
Also from X-ray diffraction diagrams for these drawn PVC-fibers the dimension of unit cell of PVC-crystal was calculated as follows; a=10.1A, b(fiber period)=5.1A, c=5.6A, and β(inclination angle)=78°. Furthermore, empirical formula with respect to crystallinity, X and L was established, as:
X=1.37 L-0.48 for these PVC-fibers
