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Mechanical properties of epoxy resin/CTBN composites
Pages: 68-70,75
Year: Issue:  2
Journal: China Synthetic Resin and Plastics

Keyword:  epoxy resinliquid carboxyl-terminated butadiene-acrylonitrile rubbermechanical propertytoughening mechanism;
Abstract: The epoxy resin (EP) was toughened by liquid carboxyl-terminated butadiene-acrylonitrile rubber (CTBN). The morphology of the EP/CTBN composites was observed by scanning electron microscope (SEM), the toughening mechanism of CTBN was analyzed and the mechanical properties of the composites were tested. The toughening mechanism of CTBN was combination of shear deformation and flux pinning mechanism. The optimal properties of the EP/CTBN composites were obtained when the CTBN amount was 15 phr. The shearing strength, tensile strength and notched Izod impact strength of the EP/CTBN system reached 16.8 MPa, 28.4 MPa and 17.53 kJ/m2, respectively. CTBN performed a block reaction with EP, and CTBN and EP formed two-phase structure with the curing process.
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