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Summary The influence of M-w of LLDPE on the rheological, thermal and mechanical properties of m-LLDPE/ HDPE blends of low and high branch content (BC) was studied. Melt rheology of m-LLDPE blended with linear HDPE revealed strong influence of M-w on melt miscibility at both branch ing levels. Low M-w m- LLDPE/HDPE blends are suggested to be miscible at all compositions, while viscosity of high M. m-LLDPE/HDPE blends showed negative deviation from log additivity suggesting layered morphology of these b lends. The DSC results suggest that compatibility in the solid state is independen t of M-w and BC. For all blends studied, the HDPE-rich blends were found to contain single crystal populations suggesting high degree of cocrystallization, wherea s, m-LLDPE rich phase showed separate crystallization. The melt miscibility and the crystallization of high BC m- LLDPE blends with HDPE are suggested to be controlled by different factors. Small strain mechanical properties of these blends were f ound to be a strong function of blend compatibility and the specific properties of the blend components.

Melt Miscibility and Mechanical Properties of Metallocene LLDPE blends with HDPE: Influence of Mw of LLDPE