Blends of a long-chain branched polypropylene (LCB-PP) and two linear polypropylenes (L-PP) (having different molecular weights) were prepared using a twin screw extruder. The linear viscoelastic properties suggested the immiscibility of the high molecular weight based blends, and the miscibility of the low molecular weight based blends. Uniaxial elongational data were obtained using a SER unit mounted on an ARES rheometer. A significant strain hardening was observed for the neat LCB-PP as well as for all the blends. Crystallinity and thermal behaviour of components were studied using DSC (differential scanning calorimetry). To investigate the solid state properties of unblended components as well as the blends, dynamic mechanical (DMA) data were analyzed.
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