Stabilization of immiscible polymer blends using structure directing metal organic frameworks (MOFs)

Autor: Grace Jones D. Kalaw, Do Nguyen, Inga H. Musselman, David Bushdiecker, Nimanka P. Panapitiya, John P. Ferraris, Sumudu N. Wijenayake, Kenneth J. Balkus, Chalita Ratanawanate, Christopher J. Gilpin, Yu Huang
Rok vydání: 2014
Předmět:
Zdroj: Polymer. 55:2028-2034
ISSN: 0032-3861
DOI: 10.1016/j.polymer.2014.03.008
Popis: 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 (PBI), 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.
Databáze: OpenAIRE
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