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The oriented crystallization of long chain hyper-branched polypropylene (LCB-PP) induced by shear deformation in the pre-crystallization regime was investigated through simultaneous time-resolved synchrotron wide-angle and small-angle X-ray scattering (WAXS and SAXS) measurements and compared with that of linear PP (L-PP). Highly oriented crystallization was induced in LCB-PP by the application of...
Shear-induced crystallization of a long chain hyper-branched polypropylene (LCB-PP, denoted PP-3) was carried out at a relatively high temperature of 170 °C, close to its melting temperature of 158 °C. Small-angle X-ray scattering (SAXS) showed that the intensity ratio of the normal to the perpendicular to the shear (V/H) was always larger than 1 for PP-3, indicating that shish-like structures were...
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