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Polymers 2018, 10(8), 829; https://doi.org/10.3390/polym10080829

Influence of Hot Chlorinated Water and Stabilizer Package on the Fatigue Crack Growth Resistance of Glass Fiber Reinforced Polyamide

Johannes Kepler University Linz, Institute of Polymeric Materials and Testing, Altenberger Strasse 69, 4040 Linz, Austria
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Received: 21 June 2018 / Revised: 16 July 2018 / Accepted: 22 July 2018 / Published: 27 July 2018
(This article belongs to the Special Issue Polymers: Design, Function and Application)
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Abstract

To assess the potential use of polyamide (PA) for solar-thermal systems applications, the effect of water with varying chlorine content on the fatigue crack growth (FCG) resistance of two PA formulations differing in their stabilizer packages was investigated at 80 °C. A commercial PA containing 30 wt % glass fibers and a standard stabilization package (PA-0) was used as the reference material. For the other formulation, the reference material PA-0 was compounded with two additional stabilizers (PA-S1). Keeping the specimen geometry and initial loading conditions the same, the total number of cycles to ultimate specimen failure was found to be reduced with an increase in chlorine content for both materials. As to the effect of the chlorine content on crack growth kinetics, the most pronounced effect in enhancing the crack growth rates or decreasing the FCG resistance was determined between 0 ppm and 1 ppm chlorine content. When comparing the relative change of FCG resistance in chlorinated water (10 ppm) to the FCG resistance in non-chlorinated water (0 ppm), the additional stabilization in the material PA-S1 appears beneficial over the stabilization in the reference material PA-0. View Full-Text
Keywords: fatigue crack growth resistance; glass fiber reinforced polyamide; superimposed mechanical-environmental testing; chlorinated water; elevated temperature; stabilizer system fatigue crack growth resistance; glass fiber reinforced polyamide; superimposed mechanical-environmental testing; chlorinated water; elevated temperature; stabilizer system
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Fischer, J.; Bradler, P.R.; Akhras, M.H.; Wallner, G.M.; Lang, R.W. Influence of Hot Chlorinated Water and Stabilizer Package on the Fatigue Crack Growth Resistance of Glass Fiber Reinforced Polyamide. Polymers 2018, 10, 829.

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