On the hydrolytic stability of polyester yarns
- 161 Downloads
The relationships between strength, molecular weight and the rate of hydrolytic attack are determined for two polyester fibres which differ in their carboxyl end group concentration. Chemical and physical tests are described briefly and predictions are made of the rates of hydrolysis at ambient and other temperatures. It is concluded that the fibres are suitable for use in environments likely to be found in civil engineering applications, when lifetimes of many hundreds of years can be expected at ambient temperature.
KeywordsIntrinsic Viscosity Chain Scission Ester Link Polyester Fibre Number Average Molecular Weight
The tests were carried out in the Concrete Laboratories at the Department of Civil Engineering, Imperial College of Science Technology and Medicine, London. The assistance of the technical staff, under the direction of Mr. P. Jellis, is gratefully acknowledged. The work was supported by Linear Composites Ltd, who supplied the equipment and fibres, by ICI who carried out some of the chemical tests, and by the Hariri Foundation who provided a studentship for one of the investigators.
- 2.Risseeuw P, Schmidt HM (1990) Hydrolysis of HT polyester yarns in water at moderate temperature. In: Proceedings of the 4th international Conference on Geotextiles, Geomembers and related products, Balkema, vol 2, The Hague, Netherlands, pp 691–696Google Scholar
- 4.Furrer E (1958) Text-Rundsch 13:129Google Scholar
- 5.Ludewing H (1964) Polyester fibres, chemistry and technology, Wiley InterscienceGoogle Scholar
- 6.Chapatawala MN (1988) Colourage 33(26):26Google Scholar
- 7.Merii AL (1992) Durability of polyester and aramid yarns in aqueous solutions. PhD Thesis, University of LondonGoogle Scholar
- 8.Miller M (1968) The structure of polymers, ReinholdGoogle Scholar