Synthesis, Characterization, and Gas Permeation Properties of a Novel Group of Polymers with Intrinsic Microporosity: PIM-Polyimides
Synthesis, Characterization, and Gas Permeation Properties of a Novel Group of Polymers with Intrinsic Microporosity: PIM-Polyimides
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DOI：
10.1021/ma901430q
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发表时间：
2009-10-27
期刊：
影响因子：
5.5
通讯作者：
Yampolskii, Yuri
中科院分区：
文献类型：
--
作者：
Ghanem, Bader S.;McKeown, Neil B.;Yampolskii, Yuri
通过与引入螺环中心的双羧酸酐的各种芳族二胺反应，制备了一系列具有类似于固有微孔聚合物（PIM）的特性的聚酰亚胺。该聚合物表现出高的表面积，由氮吸附测定，和高的热稳定性。膜气体渗透实验表明，PIM-聚酰亚胺是所有聚酰亚胺中最具渗透性的，并且对于几种重要的气体对具有接近上限的选择性。基团贡献法被用来预测渗透系数和分离因子的进一步PIM聚酰亚胺结构，揭示了未来的合成努力有价值的目标。
A range of polyimides with characteristics similar to a polymer of intrinsic microporosity (PIM) were prepared by reaction with various aromatic diamines of a bis(carboxylic anhydride) incorporating a spiro-center. The polymers exhibited high surface area, as determined by nitrogen adsorption, and high thermal stability. Membrane gas permeation experiments showed PIM-polyimides to be among the most permeable of all polyimides and to have selectivities close to the upper bound for several important gas pairs. A group contribution method was used to predict permeability coefficients and separation factors for further PIM-polyimide structures, revealing worthwhile targets for future synthetic efforts.