LDPE and LLDPE blends were prepared in a single and twin screw mixer, using different kinds and proportions of the LLDPE in order to evaluate their influence on the viscosity and cristallinity of the blends. The blends with LLDPE made with butene or hexene or octene comonomer, prepared in a twin or single screw mixer, did not show significant differences in their curves of viscosity versus shear rate. The addition of LLDPE in the PEBD changes the viscosimetric behavior of the blends especially at higher shear rate. With Differential Scanning Calorimetry we observed that the incorporation of LLDPE in the blends changes the behavior of melting curves due to its different types of crystallites.
Blends; LLDPE; LDPE; capillary rheology; DSC; polyethylene
