Počet záznamů: 1

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

SYSNO ASEP	0479630
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	An Improved Apparatus for Vapour-Liquid Equilibria Measurement in Polymer + Solvent Systems at Higher Temperatures: a Study of the Water + Poly(ethylene glycol) System.
Tvůrce(i)	Pavlíček, Jan (UCHP-M)_{RID, SAI} Bogdanić, Grozdana (UCHP-M)_{RID, ORCID, SAI} Wichterle, Ivan (UCHP-M)_{RID, ORCID, SAI}
Zdroj.dok.	Fluid Phase Equilibria. - : Elsevier - ISSN 0378-3812 Roč. 454, 25 DEC (2017), s. 111-115
Poč.str.	5 s.
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	correlation ; experimental data ; polymer-solvent system
Vědní obor RIV	CF - Fyzikální chemie a teoretická chemie
Obor OECD	Physical chemistry
CEP	GA15-19542S GA ČR - Grantová agentura ČR
Institucionální podpora	UCHP-M - RVO:67985858
UT WOS	000414879000011
EID SCOPUS	85030125753
DOI	10.1016/j.fluid.2017.09.013
Anotace	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.
Pracoviště	Ústav chemických procesů
Kontakt	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Rok sběru	2018

Počet záznamů: 1