On the processability of metallocene-catalysed polyethylene: effects of blending with ethylene–vinyl acetate copolymer
作者： J Peon , M Aguilar , JF Vega , B Del Amo , J Martınez-Salazar
DOI: 10.1016/S0032-3861(02)00941-2
关键词: Sharkskin 、 Vinyl acetate 、 Materials science 、 Polyethylene 、 Composite material 、 Copolymer 、 Ethylene-vinyl acetate 、 Extrusion 、 Polymer 、 Polymer blend
摘要: Abstract The rheological properties of metallocene-catalysed linear polyethylenes and those blends prepared with ethylene–vinyl acetate copolymers were evaluated. pure showed characteristic features polymers in the melt state, but poor processability, as would be expected for materials narrow molecular weight distribution. sharkskin slip-stick regimes appear at around 0.16 0.35 MPa, respectively, during extrusion. Blending polyethylene ethylene/vinyl gave rise to smooth extrusion a blend composition. viscoelastic response revealed behaviour heterogeneous emulsion-like polymer systems. Through application several criteria, we able locate phase inversion concentration system. This was found closely correspond that which distortion disappear
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