Predicting low density polyethylene melt rheology in elongational and shear flows with “pom-pom” constitutive equations
NJ Inkson, TCB McLeish, OG Harlen, DJ Groves - Journal of Rheology, 1999 - pubs.aip.org
A recent constitutive equation derived from molecular considerations on a model
architecture containing two branch points a “pom-pom” captures the qualitative rheological
behavior of low density polyethylene (LDPE) in shear and extension for the first time [, J.
Rheol. 42, 82 (1998)]. We use a hypothetical melt of pom-poms with different numbers of
arms to model the behavior of LDPE. The linear relaxation spectra for various LDPE
samples are mapped to the backbone relaxation times of the pom-pom modes. Data from …
architecture containing two branch points a “pom-pom” captures the qualitative rheological
behavior of low density polyethylene (LDPE) in shear and extension for the first time [, J.
Rheol. 42, 82 (1998)]. We use a hypothetical melt of pom-poms with different numbers of
arms to model the behavior of LDPE. The linear relaxation spectra for various LDPE
samples are mapped to the backbone relaxation times of the pom-pom modes. Data from …
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