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352 J.W.S. Hearle

own studies have shown that kink-bands in polyester result from a single bend at 20°C
but not around lOO"C, whereas nylon forms visible kink-bands around 100°C but not at
0°C. The conditions requiring large numbers of bends correspond roughly to peaks in
the loss modulus, which indicates a thermal transition. Studies of flex fatigue of nylon
and polyester fibres at different temperatures and humidities were found by Hearle and
Miraftab (1991) to show peaks in fatigue life in conditions which correlated with peaks
in the loss modulus.

REFERENCES

Anon. (1986) The cell membrane complex and its influence on the properties of the wool fibre. Wool Sci.
Rev., 63, 3-35.
Chapman, B.M. (1969) A mechanical model for wool and other keratin fibres. Textile Res. J., 39: 1102-
I 109.
Chapman, B.M. (1970) Observations on the mechanical behaviour of Lincoln-wool fibres supercontracted in
lithium bromide solution. J. Textile Inst., 61: 448-457.
Cumberbirch. R.J.E. and Mack, C. (1961) A quantitative theory of the loss of strength of regenerated
cellulose filaments on hydrolysis by acids. J. Textile Inst., 52: T382-T389.
Feughelman, M. (1959) Two-phase structure for keratin fibres. Textile Res. J., 29: 223-228.
Ford, J.E. (Ed.) ( 1966) Fibre Data Summaries. Shirley Institute, Manchester.
Hearle, J.W.S. (1967) The structural mechanics of fibres. J. Polym. Sci.: Part C. Polym. Symp., 20 215-249.
Hearle. J.W.S. (1977) On structure and thermomechanical responses of fibres and the concept of a dynamic
crystalline gel as a separate thermodynamic state. J. Appl. Polym. Sci.: Appl. Polym. Symp., 31: 137-161.
Hearle, J.W.S. (1989) Mechanics of yams and nonwoven fabrics. In: Textile Structural Composites. pp.
27-65, Chou, T.-W. and KO, F.K. (Eds.). Elsevier, Amsterdam.
Hearle, J.W.S. (1991) Understanding and control of textile fibre structure. J. Appl. Polym. Sci.: Appl. Polym.
Symp., 47: 1-3 I.
Hearle, J.W.S. (2000) A critical review of the structural mechanics of wool and hair fibres. Int. J. Bioi.
MucromoL, 27: 123-138.
Hearle, J.W.S. and Greer, R. (1970) On the form of lamellar crystals in nylon fibres. J. Textile Inst., 61:
240-244.
Hearle, J.W.S. and Miraftab, M. (1991) The flex fatigue of polyamide and polyester fihres, Pan 1. The
influence of temperature and humidity. J. Mate,: Sci., 26: 286 I.
Hearle, J.W.S. and Morton. W.E. (1993) Physical Properries of Textile Fibres. Textile Institute, Manchester.
Hearle, J.W.S. and Sparrow, J.T. (1979a) Mechanics of the extension of cotton fibres, I. Experimental studies
of the effect of convolutions. J. Appl. Polym. Sci., 24: 1465-1477.
Hearle, J.W.S. and Sparrow, J.T. (1979b) Mechanics of the extension of cotton fibres, 11. Theoretical
modelling. J. Appl. Polym. Sci., 24: 1857.
Hearle, J.W.S., Lamas, B. and Cooke, W.D. (1998) Arkus of Fibre Fracture und Damage to Textiles.
Woodhead Publishing, Cambridge.
Heuvel, H.M. and Huisman, R. (1985) In: High-speed Fiber Spinning, p. 310, A. Ziabucki and H. Kawai
(Eds.). Wiley-lnterscience, New York.
Jawson, M.A., Giles, P.P. and Mark, R.E. (1968) Pmc. R. Soc. London, Ser: A, 306: 389.
Kassenbeck, P. (1970) Te.?rtile Res. J., 40 330.
Kurokawa, M., Konishi, T., Taki, E and Ikeda, T. (1973) Sen-] Gakhshi, 29: T173.
Mclntyre, J.E. and Daniels. P.N. (1995) Textile Terms and Dejnitions. The Textile Institute, Manchester.
Morton, W.E. and Hearle, J.W.S. (I 993) Physicui Properties qf Textile Fibres. The Textile Institute,
Manchester, 3rd ed.
Moseley, W.W. (1963) Effect of structure and local defects on fibre strength. J. AppL Pnlym. Sci., 7:
187-201.