Simple Apparatus for the Measurement of Total Pressure of Polymer-Solvent Mixtures
| Autor: | Grozdana Bogdanić, Ivan Wichterle, Jan Pavlíček |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Vapor pressure Chemistry General Chemical Engineering Analytical chemistry 02 engineering and technology Polymer General Chemistry 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering Solvent 020401 chemical engineering Simple (abstract algebra) 0204 chemical engineering Total pressure 0210 nano-technology correlation experimental data polymer–solvent system static cell vapor–liquid |
| Zdroj: | Chemical Engineering & Technology. 42:1726-1726 |
| ISSN: | 0930-7516 |
| Popis: | We designed a new apparatus for determining total pressure in binary systems with one nonvolatile component, such as polymer + solvent mixtures. In contrast to the ebulliometric method, it enables measurement of pressure above solutions within wider concentration ranges. The apparatus was tested on mixtures of water and poly(ethylene glycol). The tested polymers had three nominal molar weights, namely 1000, 3000, and 6000 g mol-1. We correlated our measurements with the UNIQUAC-free volume model described earlier and compared them with the published data. We also tested the applicability of known predictive models on our measurements and found that the Entropic-free volume model yielded the best prediction of vapor–liquid equilibria for the studied systems |
| Databáze: | OpenAIRE |
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