Abstract
On the basis of thermal analysis it is suggested that the crystals of aliphatic nylons exhibit conformational disorder above the glass transition. The disorder begins gradually at about room temperature and is evidenced by an increase of the heat capacity to values higher than that of the melt. The specific case of nylon 6.6 is investigated by thermal analysis and x-ray diffraction. The onset of conformational disorder can be clearly separated from premelting. It is shown that the Brill transition, as defined by the merging of the two main peaks in the x-ray diffraction pattern, occurs gradually and is thermal-history-dependent. The transition is not a first-order one, it is only an incidental thermal effect, associated with a packing change in the crystal. In solution-crystallized (sc) samples this change is related to a distinct endothermic peak, while in melt-crystallized (mc) samples it is related to a broad endotherm.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
Clark ES, Wilson FC (1973) In: Kohan MI (ed) Nylon Plastics. Academic Press, New York, p 271
Starkweather Jr HW (1973) In: Kohan MI (ed) Nylon Plastics. Academic Press, New York, p 307
Bunn CW, Garner EV (1947) Proc Roy Soc London 189A:39
Bell JP, Slade PE, Dumbleton JH (1968) J Polym Sci Part A-2 6:1773
Todoki M, Kawaguchi T (1975) J Polym Sci Polym Phys Ed 15:1067
Dreyfuss P, Keller A (1970) J Macromol Sci-Phys B4:811
Slichter WP (1958) J Polym Sci 35:77
Xenopoulos A, Wunderlich B (1990) Polymer 31:1260
Xenopoulos A, Wunderlich B (1990) J Polym Sci Polym Phys Ed to appear
Wunderlich B, Grebowicz J (1984) Adv Polym Sci 60/61:1
Brill R (1942) J Prakt Chem 161:49
Schmidt GF, Stuart HA (1958) Z Naturforschung 13a:222
Olf HG, Peterlin A (1971) J Polym Sci A-2 9:1449
Wendoloski JJ, Gardner KH, Hirschinger J, Miura H, English AD (1990) Science 247:431
Starkweather Jr HW, Jones GA (1981) J Polym Sci Polym Phys Ed 19:467
Starkweather Jr HW (1989) Macromolecules 22:2000
Magill JH, Girolamo M, Keller A (1981) Polymer 22:43
Loufakis K, Wunderlich B (1987) J Polym Sci Polym Phys Ed 25:2345
Ginnings DC, Furukawa GT (1953) J Am Chem Soc 75:522
Xenopoulos A (1990) PhD Thesis Rensselaer Polytechnic Institute Troy New York (data taken with Dr. Brian Annis)
Starkweather Jr HW, Zoller P, Jones GA (1984) J Polym Sci Polym Phys Ed 22:1615
Pan R, Varma-Nair, M, Wunderlich B (1989) J Therm Anal 35:955
Wunderlich B, Möller M, Grebowicz J, Baur H (1988) Adv Polym Sci 87:1
Miller KJ, Grebowicz J, Wesson JP, Wunderlich B (1990) Macromolecules 23:849
Wunderlich B (1980) Macromolecular Physics Volume 3 Academic Press New York
Xenopoulos A, Wunderlich B, Trouw F, Narten AH, in preparation
Illers KH (1969) Makromol Chem 127:1
Author information
Authors and Affiliations
Additional information
Dedicated to Professor Dr. W. Pechhold on the occasion of his 60th birthday
Rights and permissions
About this article
Cite this article
Xenopoulos, A., Wunderlich, B. Conformational motion and disorder in aliphatic nylons The case of nylon 6.6. Colloid Polym Sci 269, 375–391 (1991). https://doi.org/10.1007/BF00654584
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00654584