Abstract: The impact property of ultra-high molecular weight polyethylene (PE-UHMW) resin was studied via "double notched" Charpy impact property tests. The influencing factors was analyzed through single factor experiment and variance analysis, the relationship among the crystallization behavior, impact property, motions of molecular chain, free volume, and the interaction of molecules was formulated. The major factor in the processing of PE-UHMW was finally determined through uniform design and step regression being the pressing temperature.

Key words: ultra-high molecular weight polyethylene, compression molding, impact property, crystallinity