Stress ageing experiments on highly drawn nylon 6 filaments were carried out at different relative humidities. It is found that a marked improvement in properties occur when ageing is carried out at 30% relative humidity (RH) for filaments drawn at 50% RH. This effect has been explained on the basis of nonlinear variation of glass transition temperature as a function of moisture content. At an RH of about 30%, additional ordered regions are formed in the presence of applied stress, resulting in an improved structure and tensile behavior of the filaments.
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References
1.
Chapman, R. D., US Patent 3,716,611, Monsanto Co., Feb. 13, 1973.
2.
Fujimoto, F. , et al., Behaviour of Nylon 6 Filaments in Cold Drawing, J. Textile Mach. Soc. Jpn, Transactions, 25, 166-172 (1972).
3.
Habibullah, M., Physical Ageing of Drawn Polypropylene and Nylon Fibres, Ph.D. thesis, University of Manchester, U.K., 1979 .
4.
Hermans, P.H. , and Platzek, P., Kolloid Z.88, 68 (1939).
5.
Hermans, J.J. , Hermans, P.H., Vermaas , D., and Weidinger, A., Recl. Trav. Chim. Pays Bas65, 427 (1946).
6.
Kaimin, I.F. , Apinic, A.P., and Galvanowski , A. Ya., The Effect of Moisture Content on the Transition Temperature of Polycaproamide , Polym. Sci. USSR17, 46-51(1975).
7.
Kawasaki, K. , Sekita, Y., Sorption and Diffusion ofWater Vapour by Nylon 6, J. Polym. Sci.A-2, 2437-2445 (1964 ).
8.
Kawasaki, K. , Sekita, Y., Kanou , K., Extension of Nylon 6 as a Function of the Extent and Nature of Absorbed Water. J. Colloid. Sci.17, 861-865 (1962).
9.
Kettle, G.J. , Variation of Glass Transition Temperature of Nylon 6 with Changing Water Content, Polymer18, 742-743 (1977).
10.
Kramer, E.J. , Stress Ageing in Anhydrous Nylon 610, J. Appl. Polym. Sci.41, 4327-4341 (1970 ).
11.
Kramer, E.J. , Bubeck, R.A., Effect of Water Content on Stress Ageing of Nylon 610, J. Appl. Phys42, 4631-4636 (1971).
12.
Matsumoto, Kiyoichi, The Intrinsic Birefringence of Nylon 6 and Nylon 66, Sen-i-Gakkaishi32, T365-T370 (1976).
13.
Mishra, S.P. , and Deopura, B.L., Tie Chains andModulus of Nylon 6 Fibres, J. Appl. Polym. Sci.27, 3211-3218 (1982 ).
14.
Morton, W.E. , and Hearle, J.W.S., Physical Properties of Textile Fibres , 2nd ed., The Textile-Institute and W. Heinemann Ltd., U.K., 1975.
15.
Perry, J.H., "Chemical Engineering Handbook," 4th ed., McGraw Hill Book Co. Inc., 1963.
16.
Prevorsek, D.C., Structure of Semicrystalline Fibres from Interpretation of Anelastic Effects, J. Polym. Sci.C-32, 343-375 (1971).
17.
Puffr, R.J. , and Sebenda, J., On the Structure and Properties of Polyamides, XXVII, The Mechanism of Water Sorption in Polyamides, J. Polym. Sci.C-16, 79-93 ( 1967).
18.
Reimschuessel, H.K., Relationships on Effect of Water of T g and Young's Modulus of Nylon 6, J. Polym. Sci. Polym. Chem. Ed.16, 1229-1236 (1978).
