1979/02/15 by Jovan S. Mijovic, Jovan Mijović, James A. Koutsky
Engineering · #Composite material #Epoxy #Epoxy Resin Curing Processes #Fiber-reinforced polymer composites #Fracture (geology) #Fracture mechanics #Materials science #Mechanical Behavior of Composites #Morphology (biology)
paper · doi:10.1002/app.1979.070230408
openalex publication_date 1979/02/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The effect of different postcure times on the fracture properties and morphology of an epoxy resin was studied. The fracture energy for crack initiation and arrest was calculated for each sample and plotted as a function of the postcure time. Nodules (25–35 nm in diameter) were observed on all fracture surfaces. Of considerable interest was the alignment of nodules in the direction of crack propagation. Longer postcure times are thought to alter the fracture energy by causing additional crosslinking in the internodular matrix.