Effect of chlorinated water on the fatigue crack growth resistance of polyethylene compounds with recyclate content for pipe applications
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Proceedings of the XXth International Plastic Pipes Conference and Exhibition, Amsterdam
The present paper aims to study the effect of chlorinated water on the slow crack growth performance of compounds containing recycled high-density polyethylene (rPE HD). Commercially available rPE HD, produced from post-consumer waste, was compounded with PE pipe grade PE100 RC in several mixing ratios. The compounds, as well as the recyclate, the PE100 RC, and an injection-molding pipe grade PE80-IM were tested in terms of fatigue crack growth at 23 °C and 60 °C in water and chlorinated water to determine the influence of a harsh environment on the fatigue crack growth performance. The recyclate showed a higher dependence on temperature and chlorine content than PE100 RC. All results of the compounds showed a clear dependence on the recyclate content. One compound performed better than PE80 IM in both, water and a chlorinated water environment.