Measurement and prediction of the solubilities of aromatic polyimide monomers in supercritical carbon dioxide with acetone
Measurement and prediction of the solubilities of aromatic polyimide monomers in supercritical carbon dioxide with acetone
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DOI：
10.1016/j.jct.2012.04.013
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发表时间：
2012-11-01
影响因子：
2.6
通讯作者：
Takishima, Shigeki
中科院分区：
文献类型：
--
作者：
Haruki, Masashi;Fukui, Naoya;Takishima, Shigeki
采用半间歇流动法测定了芳香族聚酰亚胺的代表性单体4，4‘-二氨基二苯醚(ODA)和均苯四甲酸二酸酐(PMDA)在超临界二氧化碳(SCCO(2))中的溶解度，以阐明丙酮的夹带作用。研究是在323K和20.0 Mpa下进行的，丙酮的浓度高达约20mol%。尽管oda和pmda的溶解度都随着丙酮浓度的增加而增加，但丙酮对这两种单体在SCCO(2)中的溶解度的夹带作用都低于N，N-二甲基甲酰胺，这一点在以前的工作中得到了研究。然而，与其在纯SCCO(2)中的溶解度相比，添加约10mol%的丙酮使oda和pmda的溶解度分别增加了约10倍和20倍。此外，用Peng-Robinson状态方程对其溶解度进行了预测。(C)2012爱思唯尔有限公司。保留所有权利。
The solubilities of 4,4'-diaminodiphenyl ether (ODA) and pyromellitic dianhydride (PMDA), which are the representative monomers for an aromatic polyimide, were measured in supercritical carbon dioxide (scCO(2)) using the semi-batch flow method to clarify the entrainer effect of acetone. The investigations were carried out at 323 K and 20.0 MPa with concentrations of acetone as high as approximately 20 mol%. Although the solubilities of both ODA and PMDA increased with increasing acetone concentrations, the entrainer effects of acetone on both monomer solubilities in scCO(2) were lower than those of N,N-dimethylformamide, which was investigated in previous work. However, the addition of about 10 mol% of acetone increased the solubilities of ODA and PMDA by approximately 10- and 20-fold, respectively, compared with their solubilities in pure scCO(2). Moreover, the solubilities were predicted using the Peng-Robinson equation of state. (C) 2012 Elsevier Ltd. All rights reserved.