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Abstract

A polyester microfiber and two classic fibers from the same manufacturer are examined using the critical dissolution time in phenol. In order to characterize the structures, we subject the yarns to a heat setting process at different temperatures. The monofilaments are initially tested at constant phenol temperature. The results show that the microfiber has a structure allowing good diffusion of the solvent. This property remains true even after heat treatment. On the other hand, the classic fibers show a similar behavior. Measurements of crystallinity by x-ray diffraction show that the microfiber and the circular filament are very close. This indicates that super-drawing induces the creation of longitudinal crystal zones, which do not overlap very much. Finally, the activation energy confirms this assumption. The energy barrier of the microfiber remains weak despite its increase according to the heat setting temperature.

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References

1. Bendak, A. , Kantouch, A. , and Nasr, M. F. , Some Studies on Thermal Treatments of Polyester Fibers: Structural Changes, J. Appl. Polym. Sci. 65(13), 2773–2780 (1997).

2. Dieval, F., Contribution à la Détermination de la Structure des Fibres et Microfibres de Polyester, Supporting thesis, l'Université de Haute Alsace, Mulhouse, France, November 16, 1998.

3. Gacen, J. , and Canal Arias, J. M. , Influence de la Température et de la Concentration en Phénol sur le “Temps Critique de Dissolution” du Polyester, Bull. Sci. I.T.F. 5, 17–27 (1976).

4. Gacen, J. , and Canal Arias, J. M. , Caractérisation du Polyester au Moyen d'un Parametre Thermodynamique Obtenu à Partir du Temps de Dissolution Critique, Bull. Sci. I.T.F. 28, 427–435 (1978).

5. Gacen, J. , Cayuela, D. , Gracen, I. , and Rodriguez, T. , Modification of the Fine Structure of Polyester in the Printing Process, Melliand Int. 3, 206–207 (1995).

6. Galil, F. , Studies in Polyester Fiber Morphology and Related Dyeing and Finishing Properties by the Critical Dissolution Time (CDT) Technique, Textile Res. J. 43, 615–623 (1973).

7. Grimm, H. , Determination of the Degree of Heat Setting of Polyester Fiber, Fasernforsch. Textiltech. 14, 81 (1963).

8. Gulrajani, M. L. , and Saxena, R. K. , Factors Influencing the Critical Dissolution Time of Textile Fibers, Textile Res. J. 50, 406–410 (1980).

9. Kitamura, K. , Kobayashi, S. , and Yoshida, Z. , The Mechanism of Absorption of Phenol in PET and the Estimation of Lateral Order Distribution by the Phenol Absorption Method, Sen-i Gakkaishi 27, 501 (1977).

10.

10. Mayagi, A. , and Wunderlich, B. , Etching of Crystalline Poly(ethylene Terephtalate) by Hydrolysis, J. Polym Sci. A2 10, 2073 (1972).

11.

11. Rao, M. V. S. , and Dweltz, N. E. , Influence of Macromolecular Orientation and Crystallinity on Critical Dissolution Times of Polyester Fibers, Textile Res. J. 55, 4, 247–252 (1985).

12.

12. Schroth, R. , Physicochemical Methods Used for the Characterization of Polyethylene Terephtalate Fibers, Faserforsch. Textiltech. 19, 258–264 (1968).

13.

13. Schwertassek, K. , A Simple Method to Determine the Fixing Degree of Polyamide and Polyester Fibers, Fasernforsch. Textiltech. 10, 387–392 (1959).

14.

14. Sengupta, A. K., Heat-Setting of Thermoplastic Fibres, Manuf. Fib. Technol., 188-202 (1997).

15.

15. Venkatesh, G. M. , Bose, P. J. , Shah, R. V. , and Dweltz, N. E. , Studies on Heating and Cooling of Synthetic Fibers, Yarns and Fabrics, Part I: Properties of Nylon and Polyester Filament Yarns on Heat Setting in Silicone, J. Appl. Polym. Sci. 22, 2357 (1978).

16.

16. Weigmann, H. D. , Scott, M. G. , and Ribnick, A. S. , Interactions of Nonaqueous Solvents with Textile Fibers, Part VII: Dyeability of Polyester Yarns after Heat and Solvent-induced Structural Modification, Textile Res. J. 46, 574 (1976).

17.

17. Weigmann, H. D. , Scott, M. G. , Ribnick, A. S. , and Matkowsky, R. D. , Interactions of Nonaqueous Solvents with Textile Fibers, Part VIII: Mechanism of Dye Diffusion in Solvent-treated Polyester Yarn, Textile Res. J. 47, 745 (1977).

18.

18. Weigmann, H. D. , Scott, M. G. , and Ribnick, A. S. , Interactions of Nonaqueous Solvents with Textile Fibers, Part IX: Thermal Stability of Solvent-induced Modifications in Polyester Fiber Structure, Textile Res. J. 47, 761 (1977).

19.

19. Wunderlich, B. , The Crystal Morphology, ch. III in “Macromolecular Physics,” vol. 1, Academic Press, NY, 1973, p. 210.

Polyester Fiber and Microfiber Structure by Critical Dissolution Time

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