Formation of liquid-crystalline-type structures in poly(paraamides)
作者： V. V. Zhizhenkov , S. F. Grebennikov , K. N. Busygin , N. G. Kvachadze , T. V. Smotrina
DOI: 10.1134/S0965545X17020110
关键词:
摘要: It is shown that the sorption method makes it possible to quantitatively estimate presence of ordered structures in supramolecular structure partially crystalline and liquid-crystalline paraamide polymers. Using 1H NMR spectroscopy method, growth type during spinning thermal treatment poly(paraamide) fiber analyzed. A comparison spectra as-spun heat-treated fibers at low temperatures (110–210 K) a rigid lattice reveals “loose” disordered microregions occur before treatment. Thermal results “healing” structural defects leads appearance liquid-crystalline-type owing large-scale quasi-segmental motion high temperature.
springer.com
sci-hub.se 参考文章(12)
M. M. Iovleva, L. Ya. Konovalova, L. I. Drozd, S. I. Banduryan, V. A. Platonov, G. S. Negodyaeva, N. N. Machalaba, G. A. Budnitskii, Effect of Water on the Properties of Fibres of the Armos Type Fibre Chemistry. ,vol. 33, pp. 25- 28 ,(2001) , 10.1023/A:1019273412958
E. R. Andrew, H. Y. Carr, Nuclear Magnetic Resonance Physics Today. ,vol. 9, pp. 18- 18 ,(1956) , 10.1063/1.3059898
E. A. Egorov, Molecular Dynamics and Strengthening of Liquid-Crystal Polymers Physics of the Solid State. ,vol. 47, pp. 942- 948 ,(2005) , 10.1134/1.1924859
Amit Biswas, John Blackwell, Three-dimensional structure of main-chain liquid-crystalline copolymers. 1. Cylindrically averaged intensity transforms of single chains Macromolecules. ,vol. 21, pp. 3146- 3152 ,(1988) , 10.1021/MA00189A004
Lynn Penn, Fred Larsen, Physicochemical properties of kevlar 49 fiber Journal of Applied Polymer Science. ,vol. 23, pp. 59- 73 ,(1979) , 10.1002/APP.1979.070230106
M. M. Iovleva, Densimetric study of solutions and fibers based on aromatic poly(amides) Polymer Science Series A. ,vol. 50, pp. 767- 770 ,(2008) , 10.1134/S0965545X08070067
E.A. Egorov, V.V. Zhizhenkov, I.A. Gorshkova, A.V. Savitsky, Molecular mobility in liquid-crystalline phase of oriented wholly aromatic copolyester as revealed by proton magnetic resonance Polymer. ,vol. 40, pp. 3891- 3894 ,(1999) , 10.1016/S0032-3861(98)00661-2
A. E. Zavadskii, I. M. Zakharova, Z. N. Zhukova, Features of the fine structure of aramid fibres Fibre Chemistry. ,vol. 30, pp. 6- 10 ,(1998) , 10.1007/BF02484386
E. A. Egorov, V. V. Zhizhenkov, NMR studies of molecular mobility in uniaxially stretched oriented polymers Journal of Polymer Science: Polymer Physics Edition. ,vol. 20, pp. 1089- 1106 ,(1982) , 10.1002/POL.1982.180200701
E. A. Egorov, V. V. Zhizhenkov, Reptation movements of extended macromolecules in highly oriented liquid-crystalline polymers Polymer Science Series B. ,vol. 46, pp. 334- 337 ,(2004)