Abstract
In orientation drawing of UHMPE (ultrahigh-molecular-weight polyethylene) fibres, conformational rearrangements take place that enrich the conformation set of the polymer with T-isomers and impoverish it in G-isomers. The basic increase in the orientation of T-isomers is observed in the initial stages of drawing. In orientation drawing of UHMPE gel fibre, no significant increase was found in the concentration of molecular breaks, a necessary condition for effective strengthening of the fibre. Two types of crystallites (crystallites infolded and straightened chains) and a mesophase were found in samples of multifilament UHMPE fibres. There is a smooth transition from the structure of the folded-chain crystallite (FCC) type to a structure of the straightened-chain crystallite (SCC) type with an increase in the draw ratio due to formation of a rigid amorphous phase of straightened segments of the polymer chains.
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Translated from Khimicheskie Volokna, No. 3, pp. 18–23, May–June, 2006.
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Pakhomov, P.M., Golikova, A.Y., Khizhnyak, S.D. et al. The structure of high-strength ultrahigh-molecular-weight polyethylene fibres fabricated by the gel-spinning method. Fibre Chem 38, 200–206 (2006). https://doi.org/10.1007/s10692-006-0070-8
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DOI: https://doi.org/10.1007/s10692-006-0070-8