| 초록 |
As environmental issues become important to modern society, changes in cable insulating materials are also needed. Polypropylene is used for replacing crosslinked polyethylene which was previously used as insulating materials for cable. XLPE creates environmental by-products during crosslinking process and greenhouse gas but polypropylene don’t need to crosslink and can be recycled after usage time which are great advantages to environment. For high heat-resisting property and flexibility, PP blends that were blended with Styrene ethylene butylene styrene(SEBS) were used and fabricated by melting mixing. Various effects of crystallinity of PP and cooling rate are examined comparing with pure PP. In mechanical properties, the tensile strength was decreased but elongation was increased according to the samples had higher rubber contents. As the SEBS content increased, it shows low degree of crystallinity and the highest breakdown strength at 35 wt.% SEBS content. |
