Conclusions
Chemically dyed LMPCA have been synthesized by the direct reaction of three types of active dyes with LMPCA at temperatures below 100°C for 3–6 h; they contain up to 20–40% (of the weight of the dyed product) of chemically bonded dye.
The chemically colored LMPCA are soluble in solvents for LMPCA; they form a finely crystalline structure, have a melting point close to that of the starting LMPCA, and have significantly improved thermal properties.
Upon addition of chemically dyed LMPCA to PP flake, colored undrawn monofilaments were formed, whose strength at an additive content of 10% on the weight of PP did not differ from the strength of monofilament spun under analogous conditions, and the specific bulk electrica resistance was 2–10 times smaller.
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Literature cited
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Additional information
Translated from Khimicheskie Volokna, No. 6, pp. 22–24, November–December, 1986.
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Zhun-zhui, U., Gal'braikh, L.S., Puzdyrev, M.K. et al. Use of chemically dyed low-molecular polycaproamide to prepare dyed polypropylene yarn. Fibre Chem 18, 434–437 (1987). https://doi.org/10.1007/BF00549407
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DOI: https://doi.org/10.1007/BF00549407