화학공학소재연구정보센터
Polymer(Korea), Vol.41, No.1, 139-142, January, 2017
폴리에틸렌 파이프의 융착 특성에 미치는 표면 산화의 영향
Effect of Surface Oxidation on Welding Properties of Polyethylene Pipe
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초록
가스 수송용 폴리에틸렌 파이프의 표면 산화가 견고한 융착 형성에 미치는 영향을 조사하였다. 폴리에틸렌파이프의 적재 보관 및 융착 과정에서 적용되는 열화 산화 및 자외선 산화에 의해 카보닐기와 같은 산화 관능기가 형성되었다. 표면 산화가 증가할수록 폴리에틸렌 파이프 융착 계면에서의 사슬엉킴이 불량하여 맞대기 융착부의 접합 강도는 크게 감소하였다. 폴리에틸렌 파이프의 산화도가 증가할수록 융착부 파단면에서의 변형이 현저히 감소하여 접합 강도가 낮게 나타났다.
The effect of surface oxidation of polyethylene on the secure fusion of pipe was investigated. Oxidative functional group such as carbonyl group was formed on polyethylene pipe by both thermal and ultraviolet oxidation conditions which were usually applied during storage and fusion process. The bonding strength of fusion part of polyethylene pipe decreased significantly due to the poor chain entanglement at the fusion interface as the degree of surface oxidation increased. The deformation on debonded fracture surface of fusion part was reduced significantly as the degree of surface oxidation increased.
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