Mechanical properties of epoxy networks based on DGEBA and aliphatic amines |
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| Authors: | Filiberto González Garcia Bluma G Soares Victor J R R Pita Rubén Sánchez Jacques Rieumont |
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| Affiliation: | 1. Departamento Materiais, Instituto Politécnico, Universidade do Estado do Rio de Janeiro, Rua Alberto Rangel s/n, Vila Nova, 28630‐050, Nova Friburgo, RJ, Brazil;2. Instituto de Macromoléculas, Universidade Federal do Rio de Janeiro, Centro de Tecnologia, Bl J, Ilha do Fund?o, 21945‐970, Rio de Janeiro, RJ, Brazil;3. Laboratório de Materiais Avan?ados–LAMAV, Universidade Estadual do Norte Fluminense, Centro de Ciências e Tecnologia, Ave. Alberto Lamego, 2000, 28015‐620 Campos dos Goytacazes, RJ, Brazil;4. Facultad de Química, Universidad de La Habana, Ave. Zapata y G, La Habana 10400, Cuba |
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| Abstract: | The mechanical properties of epoxy networks based on diglycidyl ether of bisphenol A epoxy resin cured with various linear aliphatic amines, such as ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and cyclic amines such as 1‐(2‐aminoethyl)piperazine and isophorone diamine, were studied. General characteristics such as Tg, density, and packing density, were determined and related to the structure and funcionality of the curing agent. Dynamic mechanical spectra were used to study both the α and β relaxations. Tensile and the flexural tests were used to determine the Young's and flexural modulus, and fracture strength all in the glassy state. Furthermore, linear elastic fracture mechanics was used to determine KIC. As a rule, isophorone diamine network presented the higher tensile and flexure modulus while 1‐(2‐aminoethyl)piperazine gave the highest toughness properties. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007 |
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| Keywords: | epoxy resin aliphatic amine network mechanical properties |
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