Gas and Vapor Sorption and Permeation in Poly(2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole-co-tetrafluoroethylene)
Gas and Vapor Sorption and Permeation in Poly(2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole-co-tetrafluoroethylene)
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聚(2,2,4-三氟-5-三氟甲氧基-1,3-间二氧杂环戊烯-四氟乙烯)中的气体和蒸气吸附和渗透
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
I. Roman
中科院分区：
文献类型：
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作者：
Rajeev Prabhakar;B. Freeman;I. Roman
测定了N2、CO2、CH4、C2H6、C3H8和C3F8的溶解度，以及N2、O2、CO2、CH4、C2H6和C3H8的渗透性，测定了由80摩尔% 2,2,4-三氟-5-三氟甲氧基-1,3-二氧唑（TTD）和20摩尔%四氟乙烯（TFE）制备的玻璃状无定形含氟聚合物，商业上称为Hyflon AD 80。随着渗透临界温度的升高，该聚合物的烃类气体溶解度和蒸气溶解度的增幅低于常规烃类聚合物。根据溶解度对临界温度的自然对数的最佳拟合，Hyflon AD 80对高摩尔质量碳氢化合物（如正癸烷）的溶解度应该比传统的碳氢聚合物低得多。该聚合物的纯气体CO2/CH4分离性能与某些用于天然气净化的碳氢化合物聚合物相当。当暴露于含有CO2和CH4混合物的进料流中时，聚合物的CO2渗透率约为250阻隔，CO2/CH4的渗透率约为250阻隔。
The solubilities of N2, CO2, CH4, C2H6, C3H8, and C3F8 and permeabilities of N2, O2, CO2, CH4, C2H6, and C3H8 were determined in a glassy, amorphous fluoropolymer prepared from 80 mol % 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole (TTD) and 20 mol % tetrafluoroethylene (TFE), commercially known as Hyflon AD 80. This polymer exhibits lower increases in hydrocarbon gas and vapor solubility with increasing penetrant critical temperature than conventional hydrocarbon polymers. On the basis of a best fit of the natural logarithm of solubility vs critical temperature, Hyflon AD 80 should have much lower solubility for high molar mass hydrocarbon compounds (e.g., n-decane) than conventional hydrocarbon polymers. Pure gas CO2/CH4 separation properties of this polymer are comparable with those of some hydrocarbon polymers considered for natural gas purification. When exposed to a feed stream containing a mixture of CO2 and CH4, the polymer exhibits a CO2 permeability of approximately 250 barrers and a CO2/CH4 mi...