Enhancing the Gas Permeability of Tröger’s Base Derived Polyimides of Intrinsic Microporosity
作者:Michael Lee、C. Grazia Bezzu、Mariolino Carta、Paola Bernardo、Gabriele Clarizia、Johannes C. Jansen、Neil B. McKeown
DOI:10.1021/acs.macromol.6b00351
日期:2016.6.14
high inherent viscosity and good film-forming properties. Gas permeability measurements demonstrate enhanced performance over previously reported polyimide-based Tröger’s base (TB) polymers confirming the benefit of the additional methyl groups within the TB diamine monomer. Notably, a polyimide derived from 4MTBDA and pyromellitic anhydride (PMDA) demonstrates gas permeability data above the 2008
报道了一系列由特洛格碱(TB)衍生的内在微孔(PIM–TB–PI)新颖的聚酰亚胺系列。TB二胺单体(4MTBDA)具有四个甲基,以限制所得聚合物中绕CN酰亚胺键的旋转。聚合物的表观BET(Brunauer,Emmett和Teller)表面积在584和739 m 2 g –1之间,在氯仿中的完全溶解性,优异的分子量,高比浓对数粘度和良好的成膜性。气体渗透率测量结果表明,与先前报道的聚酰亚胺基Tröger's碱(TB)聚合物相比,其性能得到了增强,从而证实了TB二胺单体中其他甲基的优势。值得注意的是,衍生自4MTBDA和均苯四酸酐(PMDA)的聚酰亚胺显示出重要气体对(例如O 2 / N 2,H 2 / N 2和H 2 / CH 4)的透气率数据高于2008上限。