Applied rheology for understanding flow instabilities in production of polymeric films and nanofibers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F18%3A63520667" target="_blank" >RIV/70883521:28110/18:63520667 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Applied rheology for understanding flow instabilities in production of polymeric films and nanofibers

Popis výsledku v původním jazyce

Due to the fact that polymer melts behave as non-Newtonian viscoelastic fluids, their flow behavior is rather complex and leads to number of flow phenomena which have negative impact on their processing and final product properties. The polymer melt elasticity, high shear viscosity, extensional viscosity and its tendency to slip at the solid surfaces causes the flow destabilization. Typical flow instabilities occurring during production of polymeric films and nanofibers are die drool, neck-in, dog-bone effect, draw resonance, interfacial instabilities in coextrusion as well as number of instabilities occurring in melt blowing technology such whipping, extrudate breakup, flies, shots, jam and melt spraying. In this work, it is demonstrated how the polymer melt rheology and modeling of polymer processing can be used to understand and minimize some of above mentioned flow instabilities.

Název v anglickém jazyce

Applied rheology for understanding flow instabilities in production of polymeric films and nanofibers

Popis výsledku anglicky

Due to the fact that polymer melts behave as non-Newtonian viscoelastic fluids, their flow behavior is rather complex and leads to number of flow phenomena which have negative impact on their processing and final product properties. The polymer melt elasticity, high shear viscosity, extensional viscosity and its tendency to slip at the solid surfaces causes the flow destabilization. Typical flow instabilities occurring during production of polymeric films and nanofibers are die drool, neck-in, dog-bone effect, draw resonance, interfacial instabilities in coextrusion as well as number of instabilities occurring in melt blowing technology such whipping, extrudate breakup, flies, shots, jam and melt spraying. In this work, it is demonstrated how the polymer melt rheology and modeling of polymer processing can be used to understand and minimize some of above mentioned flow instabilities.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA16-05886S" target="_blank" >GA16-05886S: Výzkum vlivu smykové a tahové reologie polymerních tavenin na stabilitu produkce meltblown nanovláken a fólií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů