The structure of high-strength ultrahigh-molecular-weight polyethylene fibres fabricated by the gel-spinning method
| Autor: | V. P. Galitsin, S. A. Kuptsov, S. A. Gribanov, M. A. Shavyrina, P. M. Pakhomov, A. Yu. Golikova, Svetlana Khizhnyak |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
chemistry.chemical_classification
Materials science General Chemical Engineering Mesophase General Chemistry Polymer Polyethylene Amorphous phase Ultrahigh molecular weight polyethylene Draw ratio chemistry.chemical_compound chemistry General Materials Science Crystallite Composite material Spinning |
| Zdroj: | Fibre Chemistry. 38:200-206 |
| ISSN: | 1573-8493 0015-0541 |
| DOI: | 10.1007/s10692-006-0070-8 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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