The Effect of Long-Chain Branching on Extensional Rheoelogy and its Correlation as a Predictor for Molecular Architecture

摘要

The effect of sparse long-chain branching on extensional rheology is analyzed for metallocene-catalyzed polyethylene resins with varying degrees of branching. The onset of extensional strain hardening distinguishes the degrees of branching while such distinctions are not apparent in shear flow behavior.