Impact of fillers (short glass fibers and rubber) on the hydrolysis-induced embrittlement of polyamide 6.6

Type Article
Date 2018-11
Language English
Author(s) Le Gac Pierre YvesORCID1, Fayolle Bruno2
Affiliation(s) 1 : IFREMER, Bretagne Ctr, Marine Struct Lab, Plouzane, France.
2 : Cnam, CNRS, Ensam, Lab PIMM, 151 Blvd Hop, Paris, France.
Source Composites Part B-engineering (1359-8368) (Elsevier Sci Ltd), 2018-11 , Vol. 153 , P. 256-263
DOI 10.1016/j.compositesb.2018.07.028
WOS© Times Cited 15
Keyword(s) Polyamide 6.6, Hydrolysis, Fracture, Embrittlement, Reinforced plastics

This study deals with the durability of composites based on polyamide 6.6 (PA6.6) in a humid environment, and more especially, with the loss of fracture properties. It is known that PA6.6 undergoes plasticization in the presence of water, but hydrolysis also occurs. This hydrolysis leads to a sharp decline in fracture properties in resin. The aim of this study is thus to understand the behavior of two PA6.6-based composites, one containing short glass fibers and the other both glass fibers and a rubber. The results showed the transition from ductile to brittle behavior as a function of hydrolysis time in resin. For composites, the drop in elongation breaking with the macromolecular chain length was linear for all ageing conditions considered here without marked transition. The results presented here can be used for lifetime prediction of PA6.6-based composites in a humid environment.

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