Deformation resonance in orientational drawing of high-modulus viscose fibre twist

Serkov, A. T.; Skorobogatykh, V. V.

doi:10.1007/bf00556172

Cited by 1 publication

(2 citation statements)

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“…The resonance will eventually lead to a break within a few cycles, which is what is observed in practice for [TMGH]OAc. 25,41 [emim]OAc (70 1C) underwent an obvious telescope-type breach: the skin ruptured, causing a visually apparent necking deformation several centimeters long, leading to a filament break.…”

Section: Practical Spinningmentioning

confidence: 99%

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Cellulose regeneration and spinnability from ionic liquids

et al. 2016

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Ionic liquid solutions of cellulose or dopes can be spun into Lyocell-type textile fibers by dry-jet wet spinning. An extruded dope is drawn over an air gap into water, where the water hydrates the ionic liquid and cellulose is regenerated. Spinnability studies have concentrated on the deformation and failure modes in the air gap and thus the rheology of the unhydrated spinning dope. Herein, a breach in the bath, another failure mode, is discussed. Dopes are prepared from the good spinning solvents NMMO·H2O and [DBNH]OAc and the poor spinning solvents [emim]OAc and [TMGH]OAc. The diffusion constants for water diffusing inwards and for ionic liquid diffusing outwards the emerging filament are measured offline. The resiliences and strengths of cellulose-ionic liquid solutions with different hydration stoichiometries are measured by means of rheometry. By calculating the diffusion dynamics, the resilience distribution of the forming filament is simulated. Gel strength distribution accounts for the tendency of [emim]OAc dopes to undergo a telescope-type breach, whereas the gelatinous solution state of [TMGH]OAc dopes accounts for their poor spinnability.

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Section: Practical Spinningmentioning

confidence: 99%

“…Strain hardening provides negative feedback against rupture. 25,41 However, this critically depends on the ability of the polymer solution to gain and retain polymer chain orientation.…”

Section: Orientation and Spinnabilitymentioning

confidence: 99%