| 초록 |
As environmental issues become important to modern society, changing cable insulating materials is needed. Crosslinked polyethylene as an existing insulating material has environmental problems such as greenhouse gas and by-products which are generated during crosslinking process. Unrecyclable is a huge problem in todays. Polypropylene, different from XLPE, can be recycled after usage time because it is non-crosslinked polymer. It is a big advantage for environment. PP is a crystalline polymer so flexibility is insufficient in itself. For giving flexibility to PP, styrene-ethylene-butylene-styrene is blended with PP and fabricate PP blends by melting mixing. Various effects of crystallinity of PP and cooling rate are examined and compared with pure PP. The results can explain that the crystal size, the degree of crystallinity and the cooling rate can be controlled the breakdown strength of PP/SEBS blends. |
