The Structure And Performance Of Polyolefin Resins Under Dynamic Shearing And High Molecular Weight Component Inducement

Because of the odds with theoretical value in tensile strength and modulus, Polyolefin resins — as the biggest production in plastics used commonly, is researched widespread and thoroughly to gain high performance. Blending and filling modifications as the conventional method to reinforced and modified polyolefin, the former is using the merit for engineering plastics in tensile strength and modulus, and for the latter, inorganic particles and fiber are frequently used. But all of them have some problems, such as low adhesion strength of interfaces, poor fluidity, bad dispersing. In comparison, blended with common-used plastics has the vital significance. Because the effect is not very good, usually process using the special equipment to control the state of aggregation structure to manufacture product of high performance.The structure and performance of three composites in shearing field were studied. For HDPE (6070EA) /HMWPE, between 2 wt % and 6wt% of HMWPE content, the tensile strength along MD is enhanced greatly, by 75% compared to SPIM samples, and by 48% compared with DPIM samples (from 33MPa to 49MPa), along TD, reaches maximum at 2wt% HMWPE content, bi-axially reinforced was achieved from the whole tendency. Scanning electron micrographs shows the interlinked lamellae, forming web-like structure, and we consider this special...