The Influence of Rigid and Flexible Monomers on the Physical-Chemical Properties of Polyimides

Author(s)

da Conceicao, Thiago Ferreira ; Felisberti, Maria Isabel

• Document type: Journal article
• Source: Journal of Applied Polymer Science; v. 131, n. 24, p. 10-pg., 2014-12-15.

Abstract

This article presents the synthesis and characterization of polyimides and copolyimides derived from rigid [4,4 '-(9-fluorenylidene) dianiline (FNDA) and 3,3 ',4,4 '-biphenyltetracarboxylic dianhydride (BPDA)] and flexible segments [4,4 '-(1,3-phenylenedioxy) dianiline (PDODA) and ethylenediaminetetraacetic dianhydride (EDTAn)], by polyaddition followed by thermal imidization of the polyamic acid. It describes the characterization of the polyimides and the polyamic acids in accordance to H-1 NMR, FTIR, GPC, and XRD analysis, as well as solubility, mechanical (DMTA and stress-strain tests), thermal (DSC and TGA), and electric properties. Among the homopolymers, FNDA-BPDA and PDODA-BPDA form free-standing films. The first presents higher T-g, thermal stability and Young's modulus. To tailor the properties copolyimides of FNDA, PDODA, and BPDA were synthesized. Young's modulus, T-g, thermal stability, dielectric constant, and solubility progressively increase with increasing amount of FNDA. (C) 2014 Wiley Periodicals, Inc. (AU)

• FAPESP's process: 10/17804-7 - Polymeric composites
• Grantee: Maria Isabel Felisberti
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 10/02098-0 - Multicomponent polymeric materials
• Grantee: Maria Isabel Felisberti
• Support Opportunities: Regular Research Grants
• FAPESP's process: 10/18268-1 - Preparation and processing of nanocomposites of polyimides with carbon nanotubes and graphen
• Grantee: Thiago Ferreira da Conceição
• Support Opportunities: Scholarships in Brazil - Post-Doctoral