Rheological behaviour of polypropylene blends utilized in foaming process

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Rheological behaviour of polypropylene blends utilized in foaming process

Popis výsledku v původním jazyce

Morphological structure of PP foams represented by the size of the bubbles and bubbles density is affected by rheological properties of the source materials. Various blends of high molecular weight and high melt strength PP were prepared in a twin screwextruder, and foamed. Their shear flow behavior as well as strain hardening during elongation were found to be the factors of a key importance in foaming process optimization. Pressure dependent shear flow behavior of the tested materials was determinedusing capillary rheometer modified with backpressure chamber, and obtained dependencies of shear viscosity on pressure conditions were analyzed in order to further tailor blend compositions regarding their following use in foaming processes. It has beendemonstrated that foam morphology might be controlled not only through degree of bubble coalescence and nucleation rate by the help of optimizing of material components ratio, but also via setting the proper processing conditions.

Název v anglickém jazyce

Rheological behaviour of polypropylene blends utilized in foaming process

Popis výsledku anglicky

Morphological structure of PP foams represented by the size of the bubbles and bubbles density is affected by rheological properties of the source materials. Various blends of high molecular weight and high melt strength PP were prepared in a twin screwextruder, and foamed. Their shear flow behavior as well as strain hardening during elongation were found to be the factors of a key importance in foaming process optimization. Pressure dependent shear flow behavior of the tested materials was determinedusing capillary rheometer modified with backpressure chamber, and obtained dependencies of shear viscosity on pressure conditions were analyzed in order to further tailor blend compositions regarding their following use in foaming processes. It has beendemonstrated that foam morphology might be controlled not only through degree of bubble coalescence and nucleation rate by the help of optimizing of material components ratio, but also via setting the proper processing conditions.

Druh

D - Stať ve sborníku

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název statě ve sborníku

Latest Trends on Engineering Mechanics, Structures, Engineering Geology

ISBN

978-960-474-203-5

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

275-278

Název nakladatele

WSEAS

Místo vydání

Athens

Místo konání akce

Corfu

Datum konání akce

22. 7. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000288686900053