Melt rheology of HDPE/EVA blends: The effects of blend ratio, compatibilization, and dynamic vulcanization

Abstract

The melt rheological behavior of high-density polyethylene (HDPE)/ethylene vinyl acetate (EVA) blends has been examined with reference to the effect of blend ratio, shear stress, and temperature. The HDPE/EVA blends exhibit pseudoplastic behavior, and the observed rheological behavior of the blends was correlated with the extrudate morphology. The experimental values of the viscosity were compared with the theoretical models. The effect of maleic-and phenolicmodified PE compatibilizers on the viscosity of H 70 blend was analyzed and found that compatibilization did not significantly increase the viscosity. The effect of dynamic vulcanization and temperature on the viscosity was also analyzed. The activation energy of the system decreased with increase in EVA content in the system. The phase continuity and phase inversion points of the blends were theoretically predicted and compared with the experimental values. The melt flow index (MFI) values of the blends were also determined and found that the MFI values decreased with increase in EVA content in the system. POLYM. ENG. SCI., 50:665-676,

Effect of PE-g-MA compatibilizer on the structure and performance of HDPE/EVA blend membranes fabricated via TIPS method

“…Blends of HDPE and EVA are a new class of thermoplastic elastomers, which couple the superior properties of HDPE and EVA and open up new avenues for the commercial use of these blends (John et al, 2011). The mechanical, rheological and thermal properties of PE and EVA blend polymers have been well studied (Ray and Khastgir, 1993;Poen et al, 2003;Khonakdar et al, 2004;John et al, 2010). Although the advantage of the use of polymer blend in the TIPS process is that pore size can be controlled by the addition of second polymer due to changes in thermodynamics and kinetic properties (Fu et al, 2006), however, there are very few reports regarding the application of PE/EVA blend polymers in fabrication of membrane.…”

Tailoring morphology to improve the gas-barrier properties of thermoplastic polyurethane/ethylene-vinyl alcohol blends

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Morphology and chain mobility of reactive blend nanocomposites of PP‐EVA/Clay

“…11 These reactions have been highly influenced by several parameters, such as the blend composition and viscosity ratio. 11,[32][33][34][35] Therefore, the blend composition and viscosity ratio used in this study for PP-EVA reactive blending were almost 1 : 1 to decrease these reactions. In this work, the reactive blending of PP and EVA using DCP as the initiator produced different products to be analyzed.…”