Structure and properties of dry-spun segmented polyurethaneurea elastic fibers

Kotani, Tetsuo; Hayashi, Seishu; Ishihara, Hideaki; Matsui, Toshimi

doi:10.1080/00222349208215458

Cited by 11 publications

(3 citation statements)

References 20 publications

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“…The NH hydrogen-bonded to CO, SO, or ether absorbs in a wide area, 3420−3450 cm -1 , separated from the free NH. This is in a qualitative agreement with the experimental results found in the literature. ,, …”

Section: Resultssupporting

confidence: 90%

“…This is in a qualitative agreement with the experimental results found in the literature. 10,28,29 The CdO bond distance increases when hydrogen bonds are formed and the corresponding absorption decreases in frequency, as expected, but other very interesting results arise from a closer examination. In the graph number of urea molecules-wave number ( Figure 10) we can observe that the "isolated" molecule absorbs at the highest frequency.…”

Section: Resultssupporting

confidence: 66%

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Hydrogen Bonding in Copoly(ether−urea)s and Its Relationship with the Physical Properties

et al. 1997

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The evolution of hydrogen bonding with temperature in three copoly(ether-urea)s with no phase separation has been studied by Fourier transform infrared spectroscopy (FT-IR) in the region of the carbonyl absorption of the urea groups. Assignment of the bands was made by supposing the existence of chains of urea groups linked by bifurcated hydrogen bonds. Quantum mechanical calculations of these chains fitted qualitatively with the experimental results. Dynamic mechanical and calorimetric experiments showed that the apparition of the band related to the "internal" urea groups of the chains produces a decrease in the glass transition of the polyether moiety of the copolymer and that prior to it a transition that we related to the glass transition of the bis(ureaphenyl)methane units takes place.X

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 66%

Hydrogen Bonding in Copoly(ether−urea)s and Its Relationship with the Physical Properties

et al. 1997

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“…The orientation of polyurethane urea fibres was studied as a function of spinning parameters, where orientation factors derived from a number of infrared bands were found to plateau at a certain stress at the take-up point of the fibre (Kotani et al 1992). Longitudinal acoustic mode (LAM) Raman spectroscopy of polyethylene fibres has been reported and compared to ATR infrared spectroscopy values of the skin orientation of the material (Tshmel, et al 1993).…”

Section: Polarisation and Orientation Analysis Of Polymeric Fibresmentioning

confidence: 99%

Spectroscopic characterisation of polymer fibres

Eichhorn

2009

Handbook of Textile Fibre Structure

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Fibers, Elastomeric

Boliek

Jensen

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Most elastomeric fibers are currently produced from either natural rubber or segmented polyurethane polymers. The elastic properties or rubber fibers derive from chemical cross‐links formed by vulcanization of either sheets or extruded threads. The segmented polyurethanes, called spandex fibers, are linear block copolymers with relatively long weakly interacting segments that are interconnected by shorter blocks in which intermolecular interactions are strong. Rubber fibers are formed either by slitting vulcanized sheets or by extruding latex into a coagulation bath followed by heating to vulcanize. Spandex fibers are most commonly formed by passing polymer solution through a spinneret followed by removal of solvent; certain spandex compositions can be formed into fibers by melt extrusion. These fibers are normally blended with hard fibers such as nylon, polyester, or cotton to form fabrics with desirable stretch and recovery characteristics. Stabilizers must be included with elastomeric fibers to provide adequate protection from exposure to heat, sunlight, atmospheric pollutants, and active chlorine materials. The unique properties and availability in fine sizes compared to rubber has recently allowed extensive penetration of spandex fibers into hosiery and sportswear markets.

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Structure and properties of dry-spun segmented polyurethaneurea elastic fibers

Cited by 11 publications

References 20 publications

Hydrogen Bonding in Copoly(ether−urea)s and Its Relationship with the Physical Properties

Hydrogen Bonding in Copoly(ether−urea)s and Its Relationship with the Physical Properties

Spectroscopic characterisation of polymer fibres

Fibers, Elastomeric

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