| 초록 |
This study was to find optimal conditions for decrosslinking process of cross-linked polyethylene by using supercritical methanol. The cross-linked polyethylene is successfully fragmented to thermoplasticized polyethylene with little degradation reactions in supercritical fluids. The thermo-plasticization reaction was accelerated with increase in temperature in the range from 340℃ to 400℃ , resulting in decrease in crosslinking density, molecular weight and mechanical properties. However, the thermoplasticized polyethylene at 380℃ presented comparable tensile strength and impact strength with a raw resin of crosslinked polyethylene. Chemical structure of main chain of polyethylene was not affected by reaction condition. |
