Soluble polybenzimidazoles with intrinsic porosity: Synthesis, structure, properties and processability
作者:Vikas Kumar、Shyambo Chatterjee、Pragati Sharma、Suman Chakrabarty、Chilukuri V. Avadhani、Swaminathan Sivaram
DOI:10.1002/pola.28979
日期:2018.5.15
6′‐tetraamino‐3,3,3′,3′‐tetramethyl‐1,1′‐spirobi[indane], for the synthesis of co‐polybenzimidazoles (co‐PBIs) with intrinsic porosity. Both these monomers possess twisted structures that can lead to “awkward” macromolecular shapes that cannot pack efficiently. The consequences of introducing these two monomers on the structure and properties of PBIs are reported. The random copolymers synthesized are amorphous
我们探索了两种新颖的共聚单体,即4,16-二羧基[2.2]对环环烷和5,5',6,6'-四氨基-3,3,3',3'-四甲基-1,1'-spirobi [茚满],用于合成具有固有孔隙率的共聚苯并咪唑(co-PBI)。这两种单体均具有扭曲的结构,可能导致无法有效堆积的“笨拙”大分子形状。报道了引入这两种单体对PBIs的结构和性能的影响。合成的无规共聚物是无定形的,玻璃化转变温度(T g s)大于400°C。Ť g ^随共聚单体含量的增加而降低,表明自由体积分数增加。共聚物具有低表面积。TEM和BET测量显示中孔形成的证据。共聚物显示出明显的二氧化碳吸附。24-mer重复单元的单链分子动力学模拟显示分子内空隙空间是由于聚合物链变形而构象迁移率降低而产生的。这些研究为具有固有孔隙度的PBI的“自下而上”合成定义了一种新的合成策略。©2018 Wiley Periodicals,Inc.J.Polym。科学,A部分:Polym。化学