Organo-soluble, segmented rigid-rod polyimides. Synthesis and properties

F. W. Harris, H. L.C. Hsu, C. J. Lee, B. S. Lee, F. Arnold, S. Z.D. Cheng

Research output: Contribution to conferencePaperpeer-review

Abstract

Several segmented, rigid-rod polyimides have been prepared that are soluble in organic solvents in their fully imidized form. The polymers were prepared from commercial dianhydrides and 2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl (TFMB). Their intrinsic viscosities ranged from 1.0 to 4.9 dL/g. Tough, colorless films could be cast from m-cresol solutions at 100°C. The polymers had glass transition temperatures (Tgs) above 275°C and displayed outstanding thermal and thermo-oxidative stability. Fibers were prepared from the 3,3′,4,4′-tetracarboxybiphenyl dianhydride (BPDA) based polymers that had moduli of 130 GPa and tensile strengths of 3.2 GPa. The thermal expansion coefficients and dielectric constants of thin films (20-25 μm) of the polymers were as low as -2.40 × 10-6 and 2.5, respectively.

Original languageEnglish
DOIs
Publication statusPublished - 1991
EventAbstracts of the 4th International Conference on Polyimides - Ellenville, NY, USA
Duration: 1991 Oct 301991 Nov 1

Conference

ConferenceAbstracts of the 4th International Conference on Polyimides
CityEllenville, NY, USA
Period91-10-3091-11-01

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Chemical Engineering (miscellaneous)

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