Modelling elongational and shear rheology of two LDPE melts

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F09%3A63508106" target="_blank" >RIV/70883521:28110/09:63508106 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Modelling elongational and shear rheology of two LDPE melts
Original language description
Experimental data of two low-density polyethylene (LDPE) melts at 200 degrees C for both shear flow (transient and steady shear viscosity as well as transient and steady first normal stress coefficient) and elongational flow (transient and steady-state elongational viscosity) as published by Pivokonsky et al. (J Non-Newtonian Fluid Mech 135: 58-67, 2006) were analysed using the molecular stress function model for broadly distributed, randomly branched molecular structures. For quantitative modelling ofmelt rheology in both types of flow and in a very wide range of deformation rates, only three nonlinear viscoelastic material parameters are needed: Whilst the rotational parameter, a(2), and the structural parameter, beta, are found to be equal for thetwo melts considered, the melts differ in the parameter f(max)(2) describing maximum stretch of the polymer chains.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Project
<a href="/en/project/IAA200600703" target="_blank" >IAA200600703: Investigation of flow behaviour for a novel class of metallocene-based polymers</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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