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

Autor(es)

da Conceicao, Thiago Ferreira ; Felisberti, Maria Isabel

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Polymer Science; v. 131, n. 24, p. 10-pg., 2014-12-15.

Resumo

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)

• Processo FAPESP: 10/17804-7 - Compósitos poliméricos
• Beneficiário: Maria Isabel Felisberti
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 10/02098-0 - Materiais poliméricos multicomponentes
• Beneficiário: Maria Isabel Felisberti
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/18268-1 - Preparação e processamento de nano-compósitos de poliimidas com nanotubos de carbono e grafeno
• Beneficiário: Thiago Ferreira da Conceição
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado