Abstract
The density of aliphatic polyamides is determined by the concentration of amido groups and additively increases in systematic order. The packing coefficient of aliphatic polyamides determined by the ratioρ a/ρ c increases with an increase in the concentration of amido groups. The density of cellulose acetateis determined by the concentration of acetate groups and decreases additively in systematic order. The calculation with the group contribution method can be used to predict the density of crystallites of fibreforming polymers. but this method only gives approximate results for amorphous regions.
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St. Petersburg University, of Design and Technology. Translated from Khimicheskie Volokna. No. 2, pp. 21–22, March–April, 1996.
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Kynin, A.T., Grebennikov, S.F., Perepelkin, K.E. et al. Prediction of the change in density in systematic series of fibre-forming polymers. Fibre Chem 28, 73–75 (1996). https://doi.org/10.1007/BF01058277
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DOI: https://doi.org/10.1007/BF01058277