Influence of molar mass distribution and long-chain branching on strain hardening of low density polyethylene
Stadler F, Kaschta J, Münstedt H, Becker F, Buback M (2009)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Review article
Publication year: 2009
Journal
Publisher: Springer Verlag (Germany)
Book Volume: 48
Pages Range: 479-490
Journal Issue: 5
DOI: 10.1007/s00397-008-0334-8
Abstract
Low-density polyethylenes (LDPE) were synthesized in a laboratory-scale autoclave under high pressure. These samples were found to possess a high molar mass tail, resulting in a distinctly bimodal molar mass distribution and a lower concentration of long-chain branching than typical of commercial LDPEs. Rheological experiments in elongation showed that these samples exhibit a very pronounced strain hardening, which could be favorable for distinct processing operations. Although the samples have a rather high molar mass (M(w) = 2...4 x 10(6) g/mol), their zero shear-rate viscosities eta(0) and their shear thinning behavior are still in a range, where thermoplastic processing is possible. Aqualitative understanding of the experimental results is tried by the model of the Cayley tree.
Authors with CRIS profile
Joachim Kaschta
Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe)
Helmut Münstedt
Technische Fakultät
Involved external institutions
Germany (DE)How to cite
APA:
Stadler, F., Kaschta, J., Münstedt, H., Becker, F., & Buback, M. (2009). Influence of molar mass distribution and long-chain branching on strain hardening of low density polyethylene. Rheologica Acta, 48(5), 479-490. https://doi.org/10.1007/s00397-008-0334-8
MLA:
Stadler, Florian, et al. "Influence of molar mass distribution and long-chain branching on strain hardening of low density polyethylene." Rheologica Acta 48.5 (2009): 479-490.
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