Highly Gas Permeable Polyamides Based on Substituted Triphenylamine

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• 作者：Debaditya Bera ; Venkat Padmanabhan ; Susanta Banerjee
• 刊名：Macromolecules
• 出版年：2015
• 出版时间：July 14, 2015
• 年：2015
• 卷：48
• 期：13
• 页码：4541-4554
• 全文大小：733K
• ISSN：1520-5835

文摘

We present synthesis, characterization, and gas transport properties of a series of new aromatic polyamides (PAs) containing tri-tert-butylphenol-substituted triphenylamine moiety (TPA). The PAs showed a good combination of thermal and mechanical properties (T_g up to 284 掳C, T_d10 up to 400 and 460 掳C in air and nitrogen, respectively, and tensile strength up to 68 MPa). Gas transport properties of these membranes were investigated for different gases at 35 掳C. The PAs showed high gas permeability with moderate gas selectivity [P_CO2 = 119.0, P_O2 = 29.0 barrer and P_CO2/P_CH4 = 37.19, P_O2/P_N2 = 9.67]. The effect of the substituted TPA unit on the gas transport properties of these membranes has been investigated and analyzed using molecular dynamics simulations. A thorough structure/property relationship for this class of materials has been established that may serve as a guide to future design of PA-based gas separation membranes.