RT info:eu-repo/semantics/article
T1 Fluorinated Biphenyl Aromatic Polyimides for Gas Separation Applications: Real Gas Mixture Study
A1 Rico Martínez, Sandra
A1 Rojas Rodríguez, Mario
A1 Esteban, Noelia
A1 Matesanz Niño, Laura
A1 Juan y Seva, Marta
A1 Alexandrova, Larissa
A1 Freeman, Benny D.
A1 Álvarez, Cristina
A1 Lozano, Ángel E.
A1 Aguilar Lugo, Carla
K1 Polimiidas
K1 Poliimidas
K1 Gases
K1 2210 Química Física
AB Three aromatic polyimides (PIs) based on diamines containing biphenyl unit and CF3-groups in m-position to amines and 6FDA of high molecular weights were synthesized. The polymers differed by number of methyl-substituents in biphenyl moiety, as 6FDA-BFAPB, PI without methyl substituents, 6FDA-4MeBFAPB, PI with 4 methyl groups, and 6FDA-4MeBFAPB, PI with 6 methyl groups. The comparative analysis of the polymers’ properties was performed with focus on their gas transport properties. All PIs demonstrated high thermostability, with decomposition temperature above 450 ºC in inert atmosphere and char yield of 45-50 % but were readily soluble at room temperature even in common organic solvents. The Tg’s of PI bearing methyl groups were notably higher than that of 6FDA-BFAPB, indicating their more rigid backbone chains. Detailed investigation of the PIs’ gas transport properties was also made for pure gases and real gas mixture in the wide interval of pressures. It was shown that introduction of the methyl substituents in the main polymer chain resulted in an important improvement of the gas transport properties; both methylated PIs were located much closer to the Robeson limit.
PB ACS
SN 0888-5885
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/70915
UL https://uvadoc.uva.es/handle/10324/70915
LA spa
NO Industrial & Engineering Chemistry Research, Febrero 2024, vol. 63, n. 8. p. 3672–3683.
NO Producción Científica
DS UVaDOC
RD 20-nov-2024