Play all audios:
ABSTRACT Thermal behavior under high pressure of the γ form nylon 6 obtained by iodine treatment was investigated by means of a high pressure differential thermal analysis. The crystalline
structures which resulted in the endo- and exo-thermic peaks in the thermogram were examined with the wide angle X-ray diffraction measurement. Under relatively low pressure (170—2000 kg
cm−2), two endothermic peaks were found. With increasing pressure, the lower temperature side endotherm due to the melting of the γ form crystal became small, while the higher one due to the
melting of the converted a form crystal became large. Under high pressure (above 2000 kg cm−2) an endotherm due to the melting of the converted α form crystal and an exotherm were observed.
This exotherm is attributed to the γ to α form transformation. In this case, the transformation occurred without melting the γ form crystal, in contrast to the situation at atmospheric
pressure. The pressure dependences of the melting peak temperatures of the α form and the γ form were almost the same and equal to 18°C per 1000 kg cm−2. SIMILAR CONTENT BEING VIEWED BY
OTHERS STRUCTURE AND MECHANICAL PROPERTIES OF BIOBASED POLYAMIDE 11 SPECIMENS SUBJECTED TO DIFFERENT HEAT TREATMENTS Article 03 June 2024 SYNTHESIS OF THERMOSETS FROM MALEIMIDOBENZOXAZINES
AND TETRAFUNCTIONAL THIOLS AND THEIR THERMAL AND MECHANICAL PROPERTIES Article 03 October 2023 FABRICATION OF SILANE-GRAFTED GRAPHENE OXIDE AND ITS EFFECT ON THE STRUCTURAL, THERMAL,
MECHANICAL, AND HYSTERETIC BEHAVIOR OF POLYURETHANE Article Open access 05 November 2020 ARTICLE PDF REFERENCES * D. R. Holmes, C. W. Bunn, and D. J. Smith, _J. Polym. Sci._, 17, 159 (1955).
* H. Arimoto, M. Ishibashi, M. Hirai, and Y. Chatani, _J. Polym. Sci., A_, 3, 317 (1965). * F. W. Lord, _Polymer_, 15, 42 (1974). * S. Ueda and T. Kimura, _Kobunshi Kagaku_, 15, 243 (1958).
* M. Tsuruta, H. Arimoto, and M. Ishibashi, _Kobunshi Kagaku_, 15, 619 (1958). * Y. Kinoshita, _Makromol. Chem._, 33, 1 (1959). * D. C. Vogelsong, _J. Polym. Sci., A_, 1, 1055 (1963). * E.
M. Bradbury, L. Brown, A. Elliott, and D. A. D. Parry, _Polymer_, 6, 456 (1965). * H. Arimoto, _J. Polym. Sci., A_, 2, 2283 (1964). * K. Miyasaka and K. Ishikawa, _J. Polym. Sci., A-2_, 6,
1317 (1968). * I. Abu-isa, _J. Polym. Sci., A-1_, 9, 199 (1971). * M. Kyotani and S. Mitsuhashi, _J. Polym. Sci., A-2_, 10, 1497 (1972). * M. Kyotani, _J. Macromol. Sci., Phys._, B11, 509
(1975). * S. Gogolewski and A. J. Pennings, _Polymer_, 18, 654 (1977). * S. Gogolewski and A. J. Pennings, _Polymer_, 16, 673 (1975). * N. Hiramatsu and S. Hirakawa, _Polym. J._, 12, 105
(1980). * K. Matsushige, K. Nagata, and T. Takemura, _Jpn. J. Appl. Phys._, 17, 467 (1978). * T. Itoh, H. Miyaji, and K. Asai, _Jpn. J. Appl. Phys._, 14, 206 (1975). * R. Roy, “_Phase
Transition_,” Pergamon Press, New York, 1973. Google Scholar * T. Ito, T. Hirata, and S. Fujita, _J. Polym. Sci., Polym. Phys. Ed._, 17, 1237 (1979). Download references AUTHOR INFORMATION
AUTHORS AND AFFILIATIONS * Department of Applied Physics, Faculty of Science, Fukuoka University, Nobuyasu Hiramatsu & Susumu Hirakawa Authors * Nobuyasu Hiramatsu View author
publications You can also search for this author inPubMed Google Scholar * Susumu Hirakawa View author publications You can also search for this author inPubMed Google Scholar RIGHTS AND
PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Hiramatsu, N., Hirakawa, S. Melting and Transformation Behavior of γ Form Nylon 6 under High Pressure. _Polym J_ 14,
165–171 (1982). https://doi.org/10.1295/polymj.14.165 Download citation * Issue Date: 01 March 1982 * DOI: https://doi.org/10.1295/polymj.14.165 SHARE THIS ARTICLE Anyone you share the
following link with will be able to read this content: Get shareable link Sorry, a shareable link is not currently available for this article. Copy to clipboard Provided by the Springer
Nature SharedIt content-sharing initiative KEYWORDS * Nylon 6 * γ Form * High Pressure * Melting Behavior * γ–α Transformation * Iodine Treatment * Pressure Dependence