We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Copolyimide molecular brushes with poly(methacrylic acid) side chains as additive to polyphthalamide membrane: Organization, physical, and transport properties.
- Authors
Ivanov, Ivan V.; Polotskaya, Galina A.; Kuryndin, Ivan S.; Sokolova, Maria P.; Yakimansky, Alexander V.
- Abstract
Macromolecules of complex architecture find application as modifiers of commercial polymeric membrane materials. In this work, copolyimide molecular brushes (coPI) composed of polyimide backbone and poly(methacrylic acid) side chains were used to modify poly(m-phenylene iso-phthalamide) (PPA). Structure, physical, mechanical, and transport properties of dense nonporous PPA/coPI membranes containing up to 10 wt% coPI were studied. The effect of included coPI on the membrane structure was estimated using atomic force microscopy and mechanical tests. The coPI modifier contributes to the additional formation of free volume elements evenly distributed throughout the membrane. Transport properties of PPA/coPI membranes were investigated via sorption tests and pervaporation separation of methanol (MeOH) and methyl tert-butyl ether (MTBE) mixtures. The inclusion of coPI modifier in the PPA membrane leads to an increase in the total flux of the membrane. The highest separation factor was found for the PPA/coPI membrane containing 10 wt% coPI; transport properties of the best membrane were compared with the literature data on separation of the azeotropic MeOH-MTBE mixture.
- Subjects
METHACRYLIC acid; BUTYL methyl ether; POLYMERIC membranes; ATOMIC force microscopy; POLYIMIDES; PERVAPORATION
- Publication
Journal of Applied Polymer Science, 2024, Vol 141, Issue 14, p1
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.55174