A comparison of vapour pressure measurements of quinizarin and leuco-quinizarin via transpiration and thermogravimetry |
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| Authors: | D Hinks M I Rafiq D M Price G A Montero B Smith |
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| Affiliation: | Department of Textile Engineering, Chemistry and Science, North Carolina State University, PO Box 8301, Raleigh, NC 27695-8301, USA.;;Department of Textile Engineering, Chemistry and Science, North Carolina State University, PO Box 8301, Raleigh, NC 27695-8301, USA.;;Institute of Polymer Technology and Materials Engineering, Loughborough University, Loughborough LE11 3TU, UK;Department of Textile Engineering, Chemistry and Science, North Carolina State University, PO Box 8301, Raleigh, NC 27695-8301, USA.;;Department of Textile Engineering, Chemistry and Science, North Carolina State University, PO Box 8301, Raleigh, NC 27695-8301, USA.; |
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| Abstract: | The vapour pressure of solids can be obtained using a number of methods, including the Knudsen effusion method, the Knudsen torque-effusion method and a transpiration method. Each method has benefits and disadvantages. Reported is a comparison of vapour pressure data for two compounds, quinizarin and leuco -quinizarin, using a transpiration method and a recently developed method based on thermogravimetry. Thermogravimetry provided vapour pressure–temperature dependence data for each compound with expediency and in agreement with the transpiration method. |
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