RT info:eu-repo/semantics/article
T1 Influence of the Composition and Imidization Route on the Chain Packing and Gas Separation Properties of Fluorinated Copolyimides
A1 Tena, Alberto
A1 Shishatskiy, Sergey
A1 Meis, David
A1 Wind, Jan
A1 Filiz, Volkan
A1 Abetz, Volker
AB A strong effect of the chemical composition and imidization method on physical and especially on gas transport properties of polyimides was demonstrated. Two fluorinated diamines 6FpDA and bisAPAF were polymerized in different ratios, employing the fluorinated dianhydride 6FDA to get polyimides with nine different compositions. For all synthesized materials three imidization methods were used: azeotropic, thermal, and chemical. The 6FDA-6FpDA homopolymers showed significant differences in the gas transport properties, indicating the influence of the imidization route on the final properties of the polyimides. For polyimides containing bisAPAF, the chemical composition played an important role due to the exchange of the hydroxyl groups by acetate groups leading to different interchain interactions. The gas transport was mainly controlled by the chain packing for thermally and azeotropically imidized polymers with bisAPAF contents lower than 30 mol %. For bisAPAF contents above 50 mol % the gas transport was controlled by the intermolecular interactions, e.g., hydrogen bonds.
PB ACS Publications
SN 0024-9297
YR 2017
FD 2017
LK https://uvadoc.uva.es/handle/10324/80072
UL https://uvadoc.uva.es/handle/10324/80072
LA spa
NO Macromolecules 2017, 50, 15, 5839–5849
NO Producción Científica
DS UVaDOC
RD 25-nov-2025