Münstedt H (2023)
Publication Type: Conference contribution
Publication year: 2023
Publisher: American Institute of Physics Inc.
Book Volume: 2997
Conference Proceedings Title: AIP Conference Proceedings
Event location: Zlin, CZE
ISBN: 9780735445475
DOI: 10.1063/5.0159580
Various strain-hardening features of polymer melts in uniaxial extension are described. Of special interest is the dependence of strain hardening on elongational rate. Long-chain branched polyethylene, commercial polystyrenes and their blends with high molar mass components exhibit strain hardening becoming more pronounced with increasing strain rate. For linear polypropylenes, strain hardening is not found within the experimental window. Adding a small amount of a linear polyethylene with ultrahigh molar mass (UHMWPE) results in strain hardening increasing with decreasing rate. Rouse times are used to qualitatively interpret the experimental results on polystyrene. The non strain hardening behavior of linear PP and HDPE can be made plausible by the Rouse model. But for a qualitative understanding of the rate dependence of strain hardening of the PP/UHMWPE blend, the existence of a separate phase of the minor component and special deformation processes at the interface with the matrix have to be postulated.
APA:
Münstedt, H. (2023). Strain hardening of various polymer melts. In Martin Zatloukal, Jan Musil (Eds.), AIP Conference Proceedings. Zlin, CZE: American Institute of Physics Inc..
MLA:
Münstedt, Helmut. "Strain hardening of various polymer melts." Proceedings of the 9th International Conference on Novel Trends in Rheology, Zlin, CZE Ed. Martin Zatloukal, Jan Musil, American Institute of Physics Inc., 2023.
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