화학공학소재연구정보센터
Journal of Applied Polymer Science, Vol.117, No.4, 2366-2372, 2010
Structure, Mechanical Properties, and Gas Permeability of Elastomers Based on Polybutadiene and Epoxy Resin
In this study, the structure, gas permeability, and mechanical properties of new elastomers based on liquid polybutadiene and epoxy resin were investigated by dynamic mechanical thermal analysis, thermogravimetric analysis, stress strain analysis, and water-resistance and gas permeability tests. The results reveal that there was complete phase separation between the epoxy resin and polybutadiene. With increasing epoxy resin content, the glass-transition temperature of the soft segment varied little. These elastomers had tensile strengths of 6-10 MPa and ultimate elongations of 500-100% according to the different epoxy resin contents. Thermogravimetric analysis revealed that these elastomers had better thermal stability, with a 5% weight loss at a temperature of around 350 degrees C. The gas permeabilities of these elastomers were measured to be 13.2-15.3 barrers for oxygen, 4.8-5.3 barrers for nitrogen, and 28-35 barrers for carbon dioxide at 23 degrees C. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 117: 2366-2372, 2010