Study on Extensional Rheological Behavior of Polyethylene Using Melt Spinning Techniques

The extensional rheological behaviors of low-density polyethylene(PE-LD),linear low-density polyethylene(PE-LLD),and high-density polyethylene(PE-HD) were studied in melt spinning process.It showed that both melt strength and extensional viscosity of PE-LD,PE-LLD,and PE-HD melt decreased with increasing temperature.With increasing extensional strain rate,both extensional stress and extensional viscosity of PE-LD,PE-LLD,and PE-HD melt decreased.