Abstract
A poly(vinyl alcohol)(PVA)/poly(acrylonitrile)(PAN) blend film was prepared and its properties were characterized to investigate the possibility of improving PVA as a reinforcing materials. From the wide-angle X-ray diffraction patterns of the blend films it can be seen that the diffraction peaks from each polymer's crystal were not changed by blending, this implies there is no mutual influence in crystallization. The water contact angle of the blend film increased with increasing PAN content. The decrease rate of the water contact angle of the blend film with time was smaller than the rate for pure PVA film. The melting temperatures of the PVA/PAN blend film only at the ratios of 99/1 and 97/3 were higher than that of pure PVA film. The thermal decomposition temperature and residual weight of the blend films were increased with increasing PAN content, indicating improved thermal stability after blending with PAN. The tensile strength and Young's modulus of the film increased after blending and the PVA/PAN blend film containing 3wt% of PAN showed the best mechanical properties.
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