Naslov
Apparatus for quick determination of liquid–liquid equilibrium in polymer solutions by the turbidimetric method
(Apparatus for quick determination of liquid–liquid equilibrium in polymer solutions by the turbidimetric method (silver medal))

Autori
Bendová, Magdalena ; Machanová, Karolina ; Bogdanić, Grozdana ; Wichterle, Ivan

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Katalog - 36th International Invention Show with International Participation, INOVA 2011 / Hrvatski savez inovatora Zagreb - Zagreb : Hrvatski savez inovatora, 2011, 129-129

Skup
36th International Invention Show with International Participation, INOVA 2011

Mjesto i datum
Zagreb, Hrvatska, 09.11.2011. - 12.11.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
determination of LLE; polymer solutions; turbidimetric method

Sažetak
A set-up for semiautomatic and quick measurement of liquid–liquid equilibrium in polymer solutions by the cloud point method was assembled and checked. The whole arrangement is shown in Figure 1. It consists of equilibrium cell, programmable thermostat, laser source with a photodiode sensor, and computer with LabVIEW software. The cell is shown in details in Figure 2. Figure 1. Assembly of apparatus Figure 2. Equilibrium cell Only 5 ml of liquid mixture is sufficient for measurement of one experimental point on the coexistence curve, which procedure takes one hour, approximately. The programmable thermostat has been used for temperature control, the turbidity has been detected by measuring intensity of a laser beam scattered by the mixture. A photodiode sensor was used to measure the scattered light intensity. Final phase split temperature as measured with a Pt100 resistance thermometer has been recorded and evaluated using the LabVIEW software. The coexistence curve of the polystyrene + methylcyclohexane system was measured in the region of the upper critical solution temperature (UCST). The obtained results are in a good agreement with available literature data.

Izvorni jezik
Engleski

Znanstvena područja
Temeljne tehničke znanosti

Napomena
Silver medal for innovation

POVEZANOST RADA