Unexpected Stress Overshoot in Extensional Flow of Star Polymer Melts
Yinrui Wang,
Anika Goecke,
Valerian Hirschberg
et al.
Abstract:Previous studies have shown that the nonlinear rheological behavior of 3-arm star polymer melts in fast extensional flow is identical to that of linear polymers with the same span molecular weight, because the star polymers are highly aligned and have a similar conformation as the corresponding linear polymers. However, with more arms, it would be more difficult for the stars to be aligned like linear chains, and the nonlinear extensional rheology of star polymers with more arms under large deformations has no… Show more
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