An Improved Apparatus for Vapour-Liquid Equilibria Measurement in Polymer + Solvent Systems at Higher Temperatures: a Study of the Water + Poly(ethylene glycol) System.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F17%3A00479630" target="_blank" >RIV/67985858:_____/17:00479630 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.fluid.2017.09.013" target="_blank" >http://dx.doi.org/10.1016/j.fluid.2017.09.013</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fluid.2017.09.013" target="_blank" >10.1016/j.fluid.2017.09.013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

An Improved Apparatus for Vapour-Liquid Equilibria Measurement in Polymer + Solvent Systems at Higher Temperatures: a Study of the Water + Poly(ethylene glycol) System.

Popis výsledku v původním jazyce

Recently we designed an apparatus for total pressure measurement in binary polymer + solvent systems. Accurate as it is, the apparatus is limited by its direct capacitance pressure sensor that can operate only at 318.15 K. In this study we tested a new setup that overcomes this limitation with a pressure transducer (MKS Baratron), which can be heated up to 430 K. The main improvement is that the new setup has eliminated solvent vapour condensation in the pressure measurement unit. Other parts of the equipment can easily be kept at temperatures higher than the system temperature with heating tapes. Unlike the ebulliometric method, which is limited by problems arising from the boiling of viscous mixtures, now we can study solutions with higher polymer concentrations. We tested the new setup by measuring the total pressure of binary poly(ethylene glycol) + water mixtures at six isotherms in the (308.15–343.15) K range. Additionally we determined new data for three isotherms (343.15, 353.15, and 363.15) K using ebulliometric method. We then correlated our measurements with both methods using the UNIQUAC–free volume model and compared them with available published data for isotherms 313.15 K and 333.15 K. The agreement with our static measurement results was excellent.

Název v anglickém jazyce

An Improved Apparatus for Vapour-Liquid Equilibria Measurement in Polymer + Solvent Systems at Higher Temperatures: a Study of the Water + Poly(ethylene glycol) System.

Popis výsledku anglicky

Recently we designed an apparatus for total pressure measurement in binary polymer + solvent systems. Accurate as it is, the apparatus is limited by its direct capacitance pressure sensor that can operate only at 318.15 K. In this study we tested a new setup that overcomes this limitation with a pressure transducer (MKS Baratron), which can be heated up to 430 K. The main improvement is that the new setup has eliminated solvent vapour condensation in the pressure measurement unit. Other parts of the equipment can easily be kept at temperatures higher than the system temperature with heating tapes. Unlike the ebulliometric method, which is limited by problems arising from the boiling of viscous mixtures, now we can study solutions with higher polymer concentrations. We tested the new setup by measuring the total pressure of binary poly(ethylene glycol) + water mixtures at six isotherms in the (308.15–343.15) K range. Additionally we determined new data for three isotherms (343.15, 353.15, and 363.15) K using ebulliometric method. We then correlated our measurements with both methods using the UNIQUAC–free volume model and compared them with available published data for isotherms 313.15 K and 333.15 K. The agreement with our static measurement results was excellent.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA15-19542S" target="_blank" >GA15-19542S: Termodynamika roztoků polymerů: experimenty jdou naproti teorii (a obráceně)</a><br>

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

Fluid Phase Equilibria

ISSN

0378-3812

e-ISSN

—

Svazek periodika

454

Číslo periodika v rámci svazku

25 DEC

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

111-115

Kód UT WoS článku

000414879000011

EID výsledku v databázi Scopus

2-s2.0-85030125753