Tensile and creep behaviour of polyethylene terephthalate and polyethylene naphthalate fibres

Type Article
Date 2011-01
Language English
Author(s) Lechat C.2, Bunsell A. R.1, Davies PeterORCID3
Affiliation(s) 1 : Mines ParisTech, Ctr Mat, CNRS, UMR 7633, F-91003 Evry, France.
2 : ERA Technol, Leatherhead KT22 7SA, Surrey, England.
3 : IFREMER, Mat & Struct Grp, F-29280 Plouzane, France.
Source Journal Of Materials Science (0022-2461) (Springer), 2011-01 , Vol. 46 , N. 2 , P. 528-533
DOI 10.1007/s10853-010-4999-x
WOS© Times Cited 24
Abstract Ropes made of twisted polyester (PET) yarns have been replacing traditional steel ropes and chains as mooring lines for offshore platforms in deep-sea environments. In order to optimise rope manufacture and the design of mooring systems, a thorough understanding of the material's mechanical behaviour is necessary. Besides PET, other materials can also be considered such as PEN, as it also a polyester similar to PET but stiffer. This paper presents a study and comparison of PET and PEN fibres' mechanical behaviour, based on experiments carried out on single filaments. Both fibres show similar non-linear tensile behaviour, with an evolution of modulus in four steps. The same microstructural model is proposed for both fibres, based on microfibrils aligned along the fibre axis and composed of an alternation of amorphous, mesamorphous and crystalline phases. The shape of the tensile loading curve is explained by the successive loading of these phases. Creep behaviour is also evaluated by considering the evolution of creep rate with applied load. This evolution is again similar for PET and PEN, both from a qualitative and quantitative point of view. The similarity in creep rate values for both fibres indicates that the microstructural mechanisms involved in creep may differ from those involved in short term tension loading.
Full Text
File Pages Size Access
6 436 KB Access on demand
Author's final draft 10 195 KB Open access
Top of the page