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《Journal of Donghua University,Natural Science》 1996-01
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FIBER FORMATION FROM LYOTROPIC CELLULOSE MESOPHASES

Hu Xuechao (China Textile University)Gilbert Fomes(Nqrtb Calorina Stale University Dept. of wood and paper Sci. Dept. of physics)  
It is postulated that to prepare a high strength / high modulus regenerated cellulose fiber: 1) A lyotropic cellulosic mcsophase is a necessary but not a sufficient condition; 2) The cellulose I morphology must be generated in the fiber; 3) Cellulose I is readily converted to cellulose II in the presence of polar solvent, a readily saponifiable cellulose derivative is required; 4) Cellulose triacetate(CTA) forms a lyotropic mesophasc in TFA / CH2C12, and the fiber spun from the mesophase has the CTA I morphology and CTA is readily saponifiablc. CTA (M.W.Ca.100,000) was used in the present study. CTA fibers were spun under various spin conditions,annealed at 235℃ ,saponified with various reagents and the tenacity, modulus, elongation, morphology were determined. Tenacity of 12+ gpd and modulus of 380+ gpd have been obtained. As predicted the cellulose I morphology results in superior properties.
【CateGory Index】: TQ341.1
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