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Combined effects of shear flow and non-isothermal processing, which were akin to the practical industrial processing, on the crystallization of metallocene-made isotactic polypropylene (m-iPP) were investigated by in-situ synchrotron wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS) techniques. The simultaneous appearance of α- and γ-crystals was observed in quiescent samples,...
To make large scale, effective use of atactic polypropylene (aPP), normally regarded as industry waste, isotactic polypropylene (iPP) was blended with aPP with a guiding ideology of “structuring processing”. Herein, the aPP/iPP blends were melt processed through modified injection molding, i.e., oscillation shear injection molding (OSIM), in which an oscillation shear flow field was applied to induce...
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