Abstract
Different crystalline structures of lineartrans-quinacridone were prepared and analysed by combination of X-ray diffraction, specific surface areas, optical and scanning electron microscopy, infrared spectroscopy, spectrophotometric analysis and differential thermal analysis. The lattice parameters of each crystalline phase were determined by X-ray diffraction. A new crystalline phase of this pigment was obtained and named theς-phase. Isothermal crystallization studies indicated that the crystallographic texture induced by pressure has a strong influence on the crystallization behaviour of this dyestuff.
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References
H. Gaertner,J. Oil Col. Chem. Assoc. 46 (1963) 13.
H. Liebermann,Annalen. 518 (1935) 245.
S. S. Labana andL. L. Labana,Chem. Rev. 67 (1967) 1.
F. Jones, N. Okui andD. Patterson,J. Soc. Dyers Colour. 91 (1975) 361.
A. Whitaker,ibid. 102 (1986) 66.
D. S. Filho, MSc thesis, Universidade Federal do Rio de Janeiro (1990).
W. A. West, US Patent 3 362 957 (1968).
K. Adachi andM. Kawaai, Japanese Patent 34665 (1973).
H. R. Schweiger, French Patent 1 452 663 (1964).
H. Bohler andF. Kehrer, Swiss Patent 405 560 (1966).
R. Hashizeime andM. Miyatake, German Patent 1 805 266 (1967).
I. Kawai, British Patent 1 110997 (1968).
R. C. Wendall, in “Handbook of chemistry and physics” (CRC Press, Boca Raton, Florida, 1987) p. F-165.
J. M. Roberton, V. C. Sinclair andJ. Troller,Acta Crystallogr. 14 (1961) 697.
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Filho, D.S., Oliveira, C.M.F. Crystalline modifications of lineartrans-quinacridone pigments. J Mater Sci 27, 5101–5107 (1992). https://doi.org/10.1007/BF01105280
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DOI: https://doi.org/10.1007/BF01105280