The effect of water on the critical stress intensity factor of unsaturated polyester resins |
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| Authors: | Geoffrey Pritchard R. G. Rose Neelam Taneja |
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| Affiliation: | (1) School of Chemical and Physical Sciences, Kingston Polytechnic, Kingston-upon-Thames, Surrey, UK;(2) School of Mechanical Aeronautical and Production Engineering, Kingston Polytechnic, Kingston-upon-Thames, Surrey, UK;(3) Present address: Rank Xerox Ltd, Welwyn Garden City, Herts |
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| Abstract: | The effect of water on the critical stress intensity factor,KIC, of a highly unsaturated isophthalic polyester resin has been measured for periods of immersion of up to 2200 h in water at temperatures of 35, 70 and 80° C.KIC decreased from 0.84±0.1 MN m–3/2 to 0.24±0.03 MN m–3/2 after immersion for 2200 h in water at 80° C. The observed changes in the critical stress intensity factor indicate that a constant value is eventually reached. This is consistent with the decline being attributable to the leaching of extractable matter from the polyester resin. |
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