Journal
POLYMER
Volume 55, Issue 8, Pages 2028-2034Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2014.03.008
Keywords
Immiscible polymer blends; Metal organic frameworks; Compatibilizers
Categories
Funding
- National Science Foundation [0933563, CHE-1126177]
- U.S. Department of Energy [DE-NT0007636, DE-FE0001293]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1126177] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [0933563] Funding Source: National Science Foundation
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We have developed a novel approach for compatibilizing immiscible polymer blends using metal organic frameworks (MOFs). For the first time we demonstrated that the droplet diameter of the dispersed phase in a 1:1 immiscible polymer blend composed of 6FDA-DAM:DABA [copolymer of 4,4-hexafluoroisopropylidene diphthalic anhydride (6FDA), 2,4,6-trimethyl-1,3-phenylenediamine and 3,5-diaminobenzoic acid (DABA)], and polybenzimidazole (FBI), is dramatically reduced obtaining a uniform microstructure with the incorporation of as low as 5% (w/w) of the zeolitic imidazolate framework-8 (ZIF-8). This indicates a large improvement in the compatibility of the immiscible polymers with the inclusion of ZIF-8. As the ZIF-8 loading was further increased to 10% (w/w), the droplet diameter further decreased resulting in even higher compatibility. The compatibilizing effect can be attributed to a reduction in the interfacial energy of the immiscible polymers due to the interfacial localization of ZIF-8. This MOF based compatibilization of immiscible polymer blends can open up opportunities for the combination of different properties of polymers in membrane-based separations and in more applications. (C) 2014 Elsevier Ltd. All rights reserved.
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