Soluble polybenzimidazoles with intrinsic porosity: synthesis, structure, properties and processability
| Title | Soluble polybenzimidazoles with intrinsic porosity: synthesis, structure, properties and processability |
| Publication Type | Journal Article |
| Year of Publication | 2018 |
| Authors | Kumar, V, Chatterjee, S, Sharma, P, Chakrabarty, S, Avadhani, CV, Sivaram, S |
| Journal | 56Journal of Polymer Science Part A-Polymer Chemistry |
| Volume | 56 |
| Issue | 10 |
| Pagination | 1046-1057 |
| Date Published | MAY |
| Type of Article | Article |
| Abstract | We have explored two novel comonomers, namely, 4,16-dicarboxyl[2.2]paracyclophane and 5,5,6,6-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 and possess glass transition temperatures (T(g)s) greater than 400 degrees C. T-g decreases with increasing comonomer content indicating an increase in fractional free volume. The copolymers have low surface area. TEM and BET measurements show evidence of mesopore formation. The copolymers show significant carbon dioxide adsorption. Single chain molecular dynamics simulation of 24-mer repeat units shows intramolecular void spaces arising as a result of distorted polymer chain with reduced conformational mobility. These studies define a new synthetic strategy for bottoms-up synthesis of PBIs with intrinsic porosity. (c) 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1046-1057 |
| DOI | 10.1002/pola.28979 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 2.952 |
Divison category:
Physical and Materials Chemistry
Polymer Science & Engineering
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