Conclusions
The thermal properties of PP yarns have been studied by determining their weight loss on heating. It has been shown that, by comparison with unmodified PP yarn, yarns containing an addition of chemically dyed LMPCA have improved thermal stability.
Addition of chemically dyed LMPCA in the spinning of PP yarn leads to an increase in mean crystallinity and a decrease in the average size of yarn crystallites after jet stretch. The existence of two morphological forms of supermolecular structure has been shown by the electron microscopy method: spherulitic and oriented along the yarn axis.
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Literature cited
Li Pei-zhin and U. Li-fun, Fantsi Syuebao (China), 5 (8), 456 (1984).
U. Zhun-zhui, L. S. Gal'braikh, et al., Khim. Volokna, No. 6, 22–24 (1986).
Additional information
Translated from Khimicheskie Volokna, No. 6, pp. 20–21, November–December, 1986.
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Zhun-zhui, U., Sergeevskaya, N.P. & Klochkov, A.A. Structure and properties of dyed polypropylene yarn containing an addition of chemically colored low-molecular polycaproamide. Fibre Chem 18, 431–433 (1987). https://doi.org/10.1007/BF00549406
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DOI: https://doi.org/10.1007/BF00549406