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- Title
Low dielectric constant polyimide nanomats by electrospinning.
- Authors
Chen, Fei; Bera, Debaditya; Banerjee, Susanta; Agarwal, Seema
- Abstract
The proper combination of material (i.e. fluorinated polyimides) and processing technique (electrospinning) could lead to the formation of polyimides with low dielectric constant, high thermo-oxidative stability and glass transition temperature, and high hydrophobicity. The polyimides in this work were based on 4, 4-bis [3′-trifluoromethyl-4′ (4′-amino benzoxy) benzyl] biphenyl (Q) and various fluorinated and non-fluorinated dianhydrides namely benzene-1,2,4,5-tetracarboxylic dianhydride, 3,3′,4,4′-biphenyltetracarboxylic dianhydride, benzophenone-3,3′,4,4′-tetracarboxylic dianhydride, and 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA). Processing of the polyimides was carried out in poly(amic acid) stage by two different methods-electrospinning and solution casting for comparison purposes. The processing of polyimides by electrospinning led to enhancement in mechanical properties (dianhydride-structure dependent) and hydrophobicity without sacrificing thermo-oxidative stability and glass transition temperatures significantly. Also, low dielectric constants (as low as 1.43) could be attained by suitable combination of dianhydride (6FDA) with 4, 4-bis [3′-trifluoromethyl-4′ (4′-amino benzoxy) benzyl] biphenyl diamine. Copyright © 2011 John Wiley & Sons, Ltd.
- Subjects
PERMITTIVITY; POLYIMIDES; NANOSTRUCTURED materials; ELECTROSPINNING; GLASS transition temperature
- Publication
Polymers for Advanced Technologies, 2012, Vol 23, Issue 6, p951
- ISSN
1042-7147
- Publication type
Article
- DOI
10.1002/pat.1997