Softening of polyethylene powders at reactor conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F13%3A43895660" target="_blank" >RIV/60461373:22340/13:43895660 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23640/13:43919678

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S138589471300689X" target="_blank" >http://www.sciencedirect.com/science/article/pii/S138589471300689X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cej.2013.05.069" target="_blank" >10.1016/j.cej.2013.05.069</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Softening of polyethylene powders at reactor conditions

Popis výsledku v původním jazyce

Polymer softening is a major problem in industrial gas phase polymerizations, because it enhances particle agglomeration and reactor wall fouling. It is thus desirable to investigate this phenomenon and identify safe operating conditions. We developed anew experimental method for the characterization of polyolefin softening and proposed a theory qualitatively correlating this phenomenon with the Young modulus. The developed laser dilatometry technique is based on the measurement of polyolefin powder deformations under a constant load at elevated temperatures. Our method enables to measure the softening of polyolefin powders in air and in hydrocarbon gases/vapors, which means that polyolefin softening can be studied at industrially relevant conditions.In the experimental part, we present results obtained for a broad set of polyethylene samples in various atmospheres. The results are in very good agreement with our theoretical expectations and thus verify the proposed effects of polyme

Název v anglickém jazyce

Softening of polyethylene powders at reactor conditions

Popis výsledku anglicky

Polymer softening is a major problem in industrial gas phase polymerizations, because it enhances particle agglomeration and reactor wall fouling. It is thus desirable to investigate this phenomenon and identify safe operating conditions. We developed anew experimental method for the characterization of polyolefin softening and proposed a theory qualitatively correlating this phenomenon with the Young modulus. The developed laser dilatometry technique is based on the measurement of polyolefin powder deformations under a constant load at elevated temperatures. Our method enables to measure the softening of polyolefin powders in air and in hydrocarbon gases/vapors, which means that polyolefin softening can be studied at industrially relevant conditions.In the experimental part, we present results obtained for a broad set of polyethylene samples in various atmospheres. The results are in very good agreement with our theoretical expectations and thus verify the proposed effects of polyme

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Chemical Engineering Journal

ISSN

1385-8947

e-ISSN

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Svazek periodika

228

Číslo periodika v rámci svazku

červen 2013

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

10

Strana od-do

907-916

Kód UT WoS článku

000326203500099

EID výsledku v databázi Scopus

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