An investigation of the mechanical properties of thermal aged polypropylene composites

Abstract

Electricity is fundamental in the modern era, and this means the transmission of electricity through cables is vital. A constant improvement is needed to ensure requirements are met. Present day high voltage insulation material cross-linked polyethylene (XLPE) suffers from poor recyclability and thermal degradation. This research aims to explore polypropylene (PP) as a recyclable replacement for XLPE for insulation materials. Two sample groups (pure PP and PP blended with elastomer and antioxidant) were manufactured. The samples were thermally aged at 150° C and tested for mechanical performance. Weibull analysis was used to assess failure probabilities. The results indicated that samples of polypropylene blended with elastomer and antioxidant retained mechanical integrity better than pure PP, with a lower probability of failure over an ageing period of 4 weeks. The results demonstrated that PP blends are potential candidates for high-voltage insulation with improved recyclability and thermal ageing resistance.

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