| 초록 |
Epoxy resins are largely being used for variable applications including coatings, adhesives, structural materials and electrical insulation due to excellent thermal and mechanical properties. Recycling of crosslinked epoxy resins became issues. The effect of swelling on the degradation of diglycidylether of bisphenol-A cured with dicyan diamide depending on glycol types was investigated for chemical recycling. In this work, diethylene glycol(DEG), diethanol amine(DEA) and bisphenol-A(BPA) as solvolytic reagent were used. Swelling of the cured epoxy resin was measured by weight gain in an oven set to 200℃ every 2 hours to 16hours. It was found that the weight gain generally increased with increasing immersion time and bevelled-off due to disintegration. It is postulated solubilities of solvolytic agent and the crosslinked epoxy resin should be similar for effective swelling before the chemical decompositions for recyclings of the epoxy resins. |
