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- W84665600 abstract "It is well known that polyethylene, although tough when stressed in air, becomes brittle in the presence of some specific substances, among which are non-ionic detergent-water solutions. In this work two polyethylenes, obtained with two different catalytic systems, were considered. Fracture behaviour was examined in air and in the presence of a stress-cracking agent (a water/Antarox CO-630 solution) at 5O°C, for both polyethylenes. The effect of detergent concentration in water was then investigated for one of the two materials. Fracture tests were performed on single edge notched specimens, in four point bending under constant load (creep). The results show that the fracture behaviour of the two materials is qualitatively very similar, although the fracture resistance levels are different. In the presence of the stress cracking agent it was observed that there is a critical value of the applied stress intensity factor, different for the two materials, above which the detergent does not seem to have any effect on fracture initiation time nor on crack propagation rate. Below this value, however, the environmental stresscracking agent accelerates fracture initiation. The concentration of the detergent in water on fracture behaviour affects both crack initiation and propagation, the stronger effect occurring for a value around 50%. The results are discussed in terms of material and stress-cracking agent characteristics, and their interactions." @default.
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- W84665600 date "2003-01-01" @default.
- W84665600 modified "2023-09-28" @default.
- W84665600 title "Effects of Detergent on Crack Initiation and Propagation in Polyethylenes" @default.
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- W84665600 doi "https://doi.org/10.1016/s1566-1369(03)80087-0" @default.
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