SynopsisThe preparation of PVA films and fibers with high modulus and high strength was examined. The high drawing was attained when both the drawing just before melting and the relaxation a t room temperature were repeated. The maximum draw ratio was 40 for the films prepared from the gels of high molecular weight (HMW) a-PVA ( D P = 12000)/water/dimethyl sulfoxide (DMSO) system (water/DMSO = 20/80). The degree of crystallinity of the dried gels prepared from the PVA/ethylene glycol (EG) system was high, 40-50%, and independent on the tacticity of PVA. The modulus of the fibers, prepared from the gels of HMW s-PVA ( D P = 15300)/EG system, drawn 15 times to its original length was the highest ( 120 GPa) .

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