The degradation characteristics of perfluoropolyethers (PFPE) currently being used as computer hard disk lubricant have been investigated. The effects of molecular weight of PFPE and phosphazene additive on the degradation of PFPE were studied. It was found that the degradation of PFPE in the presence of Al₂O₃ involves two degradation mechansms such as thermal degradation and Lewis acid disproportionation by AIF₃ which was formed by oxide-to-halide reaction between Al₂O₃ and the degraded PFPE. The thermal degradation of PFPE was reduced by increasing the molecular weight of PFPE, wile it did not cause any influence on the Lewis acid degradation of PFPE. Adding phosphazene as an additive of PFPE resulted in the enhancement of thermal properties of PFPE because it prohibited the Lewis acid disproportionation of PFPE.

컴퓨터하드디스크 윤활제로 사용되고 있는 perfluoropolyethers (PFPE)의 분해특성 및 윤활 첨가제로 사용된 포스파젠 화합물의 첨가에 따른 PFPE의 분해특성 변화에 대하여 살펴보았다. 촉매로 사용된 알루미늄 옥사이드의 존재 하에서 PFPE의 부

Keywords: perfluoropolyethers; phosphazene; thermal degradation; Al2O3; Lewis acid disproportionation