Abstract
It was investigated from a practical point of view the influence of light irradiation on the strength of drawn tape of ultra-high-molecular-weight polypropylene (UHMW-PP) prepared by the gel-casting (GC) method and the gel-like spherulite press (GSP) method. Consequently, it was found that the irradiated GC sheets prepared from 1, 2, 4 and 6 wt.% solutions had different tendencies on the change of strength by ultra-drawing. The ratio of lowering of strength increased with increase in draw ratio of both GC and GSP sheets, especially GC sheet.
