At room temperature conditions,molded plates of ultra-high molecular weight polyethylene(UHMWPE)was formed by bi-directional rolling to achieve bi-directional self-reinforced samples,and the technical feasibility of bi-directional uniform improvement of the performance of molded plates was explored,and the influence of rolling ratios on the spherulite deformation of molded plates was investigated,as well as the correlation between the aggregated structure of self-reinforced plates and their mechanical properties.The results show that rolling refines the mean spherulites size of the original molded plate from 71.2 nm to microcrystals of 39.4 nm,and the crystallinity decreases from 45.2％to 40.2％.Some orthogonal crystal systems transform into monoclinic crystal systems.The self-reinforced sheet with a rolling ratio of 36.6％achieves tensile strength of 62 MPa and 60 MPa in both directions,respectively.
关键词
固态自增强/辊压成型/超高分子量聚乙烯/取向
Key words
Solid State Self-enhancement/Roll Forming/Ultra High Molecular Weight Polyethylene/Orientation
维普
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