Luca Boragno, Hermann Braun, Anna Hartl, Reinhold Lang,
"Polypropylene for Pressure Pipes?From Polymer Design to Long-Term Performance"
: Deformation and Fracture Behaviour of Polymer Materials, Serie Springer Series in Materials Science SSMATERIALS, Vol. 247, Springer, Cham, Seite(n) 189-201, 7-2017, ISBN: 978-3-319-41879-7
Polypropylene for Pressure Pipes?From Polymer Design to Long-Term Performance
Sprache des Titels:
Deformation and Fracture Behaviour of Polymer Materials
In order to create polypropylene materials that meet pipe applications requirements, good knowledge of the material?s structure?property relationships is necessary, as well as the right analytical tools to assess the final properties. The effect of crystallisation conditions, polymorphism and processing on the impact resistance of some nucleated pipe grades was studied. A dependency between polymorphism, process conditions and final pipe properties is reported. A short-term method for measuring the slow crack growth was successfully developed and applied, and a crack has been observed via microscopy. It was observed that a large plastic zone is formed in the specimen before the crack initiation and also ahead of the crack tip.