Intrinsically microporous polyimides containing spirobisindane and phenazine units: Synthesis, characterization and gas permeation properties
作者:Bharat Shrimant、Yuvraj Dangat、Ulhas K. Kharul、Prakash P. Wadgaonkar
DOI:10.1002/pola.28950
日期:2018.4.1
dianhydrides. PIM‐PIs exhibited amorphous nature, high thermal stability (T10 > 480 °C) and intrinsic microporosity (BET surface area = 59–289 m2/g). The gas permeation characteristics of films of selected PIM‐PIs were evaluated and they exhibited appreciable gas permeability as well as high selectivity. The CO2 and O2 permeability of PIM‐PIs were in the range 185.4–39.2 and 30.6–6.2 Barrer, respectively. Notably
含有螺双茚满和吩嗪单元的新二胺,即3,3,3',3'-四甲基-2,2',3,3'-四氢-1,1'-螺双[环戊[b]吩嗪] -7从商用5,5',6,6'-四羟基-3,3,3',3'-四甲基-1,1'-螺双茚满(TTSBI)开始合成7,-二胺(TTSBIDA)。TTSBI被氧化为3,3,3',3'-四甲基-2,2',3,3'-四氢-1,1'-螺双[茚] -5,5',6,6'-四酮( TTSBIQ)随后与4-硝基-1,2-苯二胺缩合,得到3,3,3',3'-四甲基-7,7'-二硝基-2,2',3,3'-四氢-1 ,1'-spirobi [cyclopenta [b] phenazine](TTSBIDN)。在Pd / C作为催化剂存在下,使用水合肼通过将硝基还原来将TTSBIDN转化为TTSBIDA。通过将TTSBIDA与市售的芳香族二酐缩聚,合成了一系列具有固有微孔性(PIM-PIs)的新型聚