Solubility of CO2 in solid-state PET measured by pressure-decay method |
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Authors: | Miaocan Chen Ling Zhao Tao Liu Jiangwei Wu and Weikang Yuan |
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Affiliation: | (1) State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China |
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Abstract: | The solubility of CO2 in solid-state PET was measured using a pressure-decay method. In order to calculate the solubility of CO2 in the amorphous region of PET, the crystallinity of solid state PET dissolved in CO2 at different pressures and temperatures was measured by differential scanning calorimetry (DSC). The solubility increases
with increasing pressure and it follows a linear relationship and obeys Henry’s law when the pressure is below 8 MPa. The
effect of temperature on solubility is weak and the solubilities at different temperatures are almost the same under low pressures.
At higher pressure, the solubility decreases with an increase in temperature. The solubility of CO2 in the amorphous region of PET at 373.15 K, 398.15 K and 423.15 K was correlated with the Sanchez-Lacombe equation of state
with a maximal correlation error of 6.69%.
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Translated from Journal of East China University of Technology (Natural Science Edition), 2007, 33(4): 445–449 译自: 华东理工大学学报(自然科学版)] |
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Keywords: | solubility CO2 solid state PET pressure-decay method |
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