Papers
Plastic Pipes Conference Association # 2018 Las-Vegas
Andreas Frank, Isabelle J. Berger, Mario Messiha, Carl-Gustaf Ek, Norbert Schuler, Jens-Martin Storheil, Erwin Mayrbäurl, Steve Heeley, Frank Krause, Lodewijk Niemöller, Philippe Gabriëls, Yogesh S. Deshmukh, Florian Arbeiter, Thomas Koch, Gerald Pinter
In order to improve the circular economy of polymers in terms of sustainability and reduced carbon footprint, the increased use of recyclates has become a topic of major importance. Due to their long design lifetimes, pipe applications represent an excellent opportunity to create added value to non-virgin polymers. In this context, special attention must be paid to the resistance of such materials against slow crack growth (SCG) which is the essential material property for structural long-term performance of 50 years or even more. The current paper demonstrated the applicability of the Cyclic Cracked Round Bar (CRB) Test according ISO 18489 for a quick and sensitive SCG characterization and material ranking of different non-virgin PE, PP and PVC. Moreover, by systematical mixing of PE and PP it is shown that already a small amount of polymeric impurity has a big impact on the long-term relevant resistance against SCG.
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