Synthesis and a Preliminary Characterization of Poly(Propylene)Imine Hexadecylamine Dendrimer (DAB-Am-16) Modified with Methyl Acrylate
Devaney Ribeiro do Carmo *
Department of Physics and Chemistry, Faculty of Engineering of Ilha Solteira, UNESP - Univ Estadual Paulista,, Av. Brazil Center, 56 ZIP 15385-000, Ilha Solteira, SP, Brazil
Tayla Fernanda Serantoni da Silveira
Department of Physics and Chemistry, Faculty of Engineering of Ilha Solteira, UNESP - Univ Estadual Paulista,, Av. Brazil Center, 56 ZIP 15385-000, Ilha Solteira, SP, Brazil
Rosângela Silva de Laurentiz
Department of Physics and Chemistry, Faculty of Engineering of Ilha Solteira, UNESP - Univ Estadual Paulista,, Av. Brazil Center, 56 ZIP 15385-000, Ilha Solteira, SP, Brazil
Urquisa Oliveira Bicalho
Department of Physics and Chemistry, Faculty of Engineering of Ilha Solteira, UNESP - Univ Estadual Paulista,, Av. Brazil Center, 56 ZIP 15385-000, Ilha Solteira, SP, Brazil
Leandro Martins
Institute of Chemistry of Araraquara, UNESP - Univ Estadual Paulista, Rua Francisco Degni, 55, ZIP 14801-970, Araraquara, SP, Brazil
Newton Luiz Dias Filho
Department of Physics and Chemistry, Faculty of Engineering of Ilha Solteira, UNESP - Univ Estadual Paulista,, Av. Brazil Center, 56 ZIP 15385-000, Ilha Solteira, SP, Brazil
Leonardo Lataro Paim
Institute of Chemistry of Araraquara, UNESP - Univ Estadual Paulista, Rua Francisco Degni, 55, ZIP 14801-970, Araraquara, SP, Brazil
*Author to whom correspondence should be addressed.
Abstract
This paper describes the reaction of a Poly(propylene)imine hexadecylamine dendrimer (DAB-Am-16) with methyl acrylate. The modified dendrimer obtained (DKMA) was characterized by vibrational spectroscopy, nuclear resonance magnetic (13C), thermogravimetry and scanning electron microscopy. The dielectric properties of DKMA were studied in a temperature range of -40 to 100°C varying the frequency from 10 to 1000 KHz. A relative thermal stability was found for DKMA. The modified dendrimer behaved as an organic insulating (ε' = 5.1). The synthesis performed at basic medium results in a corresponding change in the conformational property of the precursor. The electron microscopy indicated that the dendrimer presented a modified collapsed shape, expected by the proposed route of synthesis.
Keywords: Dendrimer, methyl acrylate, thermal analysis, dielectric properties, synthesis