Polyimides Containing Phosphaphenanthrene Skeleton: Gas-Transport Properties and Molecular Dynamics Simulations.

ABSTRACT: A series of new semifluorinated polyimide (PI) films with phosphaphenanthrene skeleton were prepared by thermal imidization of poly(amic acid)s derived from a diamine monomer: 1,1-bis[2'-trifluoromethyl-4'-(4″-aminophenyl)phenoxy]-1-(6-oxido-6H-dibenz⟨c,e⟩⟨1,2⟩oxaphosphorin-6-yl)ethane on reaction with four structurally different aromatic dianhydrides. The chemical structures of the polymers were established by Fourier transform infrared and ¹H NMR spectroscopy techniques. The polymers showed a good combination of thermal and mechanical properties (T _d10 up to 416 °C under synthetic air and tensile strength up to 91 MPa), low dielectric constant (2.10-2.55 at 1 MHz), and T _g values as high as 261 °C. Gas permeabilities of

SUBMITTER: Chatterjee R 

PROVIDER: S-EPMC6644473 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature