Phthalimide based polymers of intrinsic microporosity

详细信息	查看全文 | 推荐本文 |

• 作者：Saad Makhseed ; ^{saad.makhseed@ku.edu.kw} ; Fadi Ibrahim ; Jacob Samuel
• 关键词：Microporous polymers ; Membrane ; Molecular weight distribution
• 刊名：Polymer
• 出版年：2012
• 期刊代码：83_00323861
• 类别：ms
• 出版时间：21 June, 2012
• 卷：53
• 期：14
• 页码：2964-2972
• 文件大小：951 K

摘要

A series of phthalimide based microporous polymers were successfully prepared by conventional nucleophilic substitution reaction of several newly synthesized fluoro-monomers with commercially available 5,5鈥?6,6鈥?tetrahydroxy-3,3,3鈥?3鈥?tetramethylspirobisindane. FTIR, ¹H NMR, and elemental analyses were used to identify the proposed structures of the polymers. The synthesized polymers are of high molecular weight as demonstrated by Gel Permeation Chromatography (GPC). Thermogravimetric analysis shows that the prepared polymers were stable up to 300聽掳C. From the porosity analysis it is clear that the prepared polymers are analogous to polymers of intrinsic microporosity (PIMs) with high surface area (500-900聽m²/g). The t-plot analysis shown that the major contribution to the specific surface area is arising from the micropore surface area with narrow size distribution of ultramicropores as confirmed by the Horvath-Kawazoe (H-K) analysis. The hydrogen storage capacity of the prepared PIM-R(1-7) and CO-PIM(3,4,6,7) were promising (up to 1.26聽wt%, 77聽K, at 1.13聽bar) with high isoteric heats of H₂ adsorption (8.5聽kJ/mol).The results of this study demonstrate that controlling the appropriate monomer content via the three-dimensional structure can provide a uniform microporous morphology in the target polymers.