Vitrification Conditions and Porosity Prediction of CO2 Blown Polystyrene Foams.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F17%3A00484016" target="_blank" >RIV/67985858:_____/17:00484016 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/17:43913545 RIV/49777513:23640/17:43932480

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.supflu.2017.03.013" target="_blank" >http://dx.doi.org/10.1016/j.supflu.2017.03.013</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.supflu.2017.03.013" target="_blank" >10.1016/j.supflu.2017.03.013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Vitrification Conditions and Porosity Prediction of CO2 Blown Polystyrene Foams.

Popis výsledku v původním jazyce

Experiments with CO2-blown hanging polystyrene (PS) films were carried out. The porosity of foams decreased with decreasing film thickness, indicating thus effects of heat and/or mass transfer. Taking into account the Joule-Thomson effect, mathematical model based on a simplified heat balance for the system PS+CO2 at the conditions of PS saturation with CO2 on one side and at the conditions of foam vitrification at glass transition temperature on the other side was derived to estimate the foam porosity. The model was applied to data on CO2-blown hanging films as well as literature data on foaming of PS particles. The trends of porosity dependence on saturation temperature and film thickness predicted by the model correspond to experimental results. The Joule-Thomson effect included in the modelling of the CO2 foaming process significantly affects the foam porosity and improves the predictive capabilities of simple model based on enthalpy balance and thermodynamic data.

Název v anglickém jazyce

Vitrification Conditions and Porosity Prediction of CO2 Blown Polystyrene Foams.

Popis výsledku anglicky

Experiments with CO2-blown hanging polystyrene (PS) films were carried out. The porosity of foams decreased with decreasing film thickness, indicating thus effects of heat and/or mass transfer. Taking into account the Joule-Thomson effect, mathematical model based on a simplified heat balance for the system PS+CO2 at the conditions of PS saturation with CO2 on one side and at the conditions of foam vitrification at glass transition temperature on the other side was derived to estimate the foam porosity. The model was applied to data on CO2-blown hanging films as well as literature data on foaming of PS particles. The trends of porosity dependence on saturation temperature and film thickness predicted by the model correspond to experimental results. The Joule-Thomson effect included in the modelling of the CO2 foaming process significantly affects the foam porosity and improves the predictive capabilities of simple model based on enthalpy balance and thermodynamic data.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

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

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Supercritical Fluids

ISSN

0896-8446

e-ISSN

—

Svazek periodika

127

Číslo periodika v rámci svazku

SEP 2017

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

000405879400001

EID výsledku v databázi Scopus

2-s2.0-85016410539