FTIR spectroscopic characterization of structural changes in polyamide-6 fibers during annealing and drawing

Journal of Polymer Science Part B: Polymer PhysicsVolume 39, Issue 5 p. 536-547 FTIR spectroscopic characterization of structural changes in polyamide-6 fibers during annealing and drawing N. Vasanthan, Corresponding Author N. Vasanthan TRI/Princeton, 601 Prospect Avenue, Princeton, New Jersey 08852TRI/Princeton, 601 Prospect Avenue, Princeton, New Jersey 08852Search for more papers by this authorD. R. Salem, D. R. Salem TRI/Princeton, 601 Prospect Avenue, Princeton, New Jersey 08852Search for more papers by this author N. Vasanthan, Corresponding Author N. Vasanthan TRI/Princeton, 601 Prospect Avenue, Princeton, New Jersey 08852TRI/Princeton, 601 Prospect Avenue, Princeton, New Jersey 08852Search for more papers by this authorD. R. Salem, D. R. Salem TRI/Princeton, 601 Prospect Avenue, Princeton, New Jersey 08852Search for more papers by this author First published: 23 January 2001 https://doi.org/10.1002/1099-0488(20010301)39:5<536::AID-POLB1027>3.0.CO;2-8Citations: 147Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract First, we report the development of Fourier transform infrared (FTIR) spectroscopic methods to determine the α/γ-crystalline phase ratio of polyamide-6 fibers and, in combination with density measurements, the total crystallinity. Using density determinations of the crystallinity of pure α and pure γ samples, we found the absorption coefficient ratio for the 930 (α) and 973 cm−1 (γ) bands to be 4.4, from which we could obtain the α/γ ratio for any polyamide-6 sample. The application of this FTIR method to the quantitative analysis of phase changes during thermal treatment and the drawing of polyamide-6 was then made. We confirmed that crystallization during thermal treatments involved increases in both phases and did not involve crystal-to-crystal transformation, whereas drawing involved both crystallization of the amorphous phase in the α form and γ→α transformation. Finally, we revisited the band assignments for the amorphous phase of polyamide-6 and found that the band at 1170 cm−1 was not an amorphous band but, because its absorbance was independent of crystallinity, could be used as an internal reference band. The band at 1124 cm−1 was reliably attributed to the amorphous phase. © 2001 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 39: 536–547, 2001 REFERENCES AND NOTES 1 Park, J. B.; Devries, K. L.; Statton, W. O. J Macromol Sci Phys 1978, B15, 229. 2 Prevorsek, D. C.; Harget, P. J.; Sharma, R. K.; Reimschuessel, A. C. J Macromol Sci Phys 1973, B8, 127. 3 A Guide to Material Characterization and Analysis; J. P. Sibilia, Ed.; VCH: New York, 1994. 4 Hutchison, J. L.; Murthy, N. S.; Samulski, E. T. Macromolecules 1996, 29, 5551. 5 Heuvel, H. M.; Huisman, R. J Appl Polym Sci 1981, 26, 713. 6 Murthy, N. S.; Curran, S. A.; Ahroni, S. M.; Minor, H. Macromolecules 1990, 24, 3215. 7 Salem, D. R.; Moore, R. A. F.; Weigmann, H. D. J Polym Sci Part B: Polym Phys 1987, 25, 567. 8 Sandeman, I.; Keller, A. J Polym Sci Polym Phys Ed 1956, 19, 101. 9 Murthy, N. S.; Bray, R. G.; Correale, S. T.; Moore, R. A. F. Polymer 1995, 36, 3863. 10 Hatfield, G. R.; Glans, J. H.; Hammond, W. B. Macromolecules 1990, 23, 1654. 11 Tzou, D. L.; Spiess, H. W.; Curran, S. J Polym Sci Part B: Polym Phys 1994, 32, 1521. 12 Schreiber, R.; Veeman, W. S.; Gabrielse, W.; Arnauts, J. Macromolecules 1999, 32, 4647. 13 Vasanthan, N.; Salem, D. R. J Polym Sci Part B: Polym Phys 2000, 38, 516. 14 Vasanthan, N.; Salem, D. R. Mater Res Innovation, in press. 15 Nichols, J. B. J Appl Phys 1954, 25, 840. 16 Arimoto, H. J Polym Sci 1964, 2, 2283. 17 Rotter, G.; Ishida, H. J Polym Sci Part B: Polym Phys 1992, 30, 489. 18 Arimoto, H.; Ishibashi, M.; Hirai, M.; Chatani. J Polym Sci A 1965, 3, 317. 19 Koenig, J. L. Spectroscopy of Polymers; American Chemical Society: Washington, DC, 1992. 20 Kampf, G. Characterization of Plastics by Physical Methods; Hanser: Munich, 1986. 21 Koenig, J. L. J Macromol Sci Phys 1972, B6, 713. 22 Sissler, H. W.; Holland-Moritz, K. Infrared and Raman Spectroscopy of Polymers; Marcel Dekker: New York, 1980. 23 Vasanthan, N.; Murthy, N. S.; Bray, R. G. Macromolecules 1998, 31, 8433. Citing Literature Volume39, Issue51 March 2001Pages 536-547 ReferencesRelatedInformation