Rheological Characterization and Constitutive Modeling of Two LDPE Melts

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F09%3A00327898" target="_blank" >RIV/67985874:_____/09:00327898 - 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
Rheological Characterization and Constitutive Modeling of Two LDPE Melts
Original language description
Experimental data of two low-density polyethylene (LDPE) melts at 200°C for both shear flow (transient and steady shear viscosity as well as steady first normal stress coefficient) and elongational flow (transient and steady-state elongational viscosity)were analyzed by use of the Molecular Stress Function (MSF) model for broadly distributed, randomly branched molecular structures. For quantitative modeling of melt rheology in both types of flow and in a very wide range of deformation rates, only threenonlinear viscoelastic material parameters are needed: While the rotational parameter and the structural parameter are found to be equal for the two melts considered, the melts differ in the parameter describing maximum stretch of the polymer chains.
Czech name
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Czech description
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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
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>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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