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http://dx.doi.org/10.5805/KSCI.2012.14.3.472

A Study of Fine Fiber Formation and Physical Properties of Polyacrylonitrile Copolymer  

Lee, Shin-Hee (Dept. of Clothing & Textiles, Kyungpook National University)
Publication Information
Fashion & Textile Research Journal / v.14, no.3, 2012 , pp. 472-477 More about this Journal
Abstract
The conditions of wet spinning were considered in order to prepare the fine denier of acrylic fiber. Polyacrylonitrile copolymer was synthesized by the copolymerization of acrylonitrile (AN) and methyl acrylate (MA) initiated by an aqueous sulfite-chlorate redox system. Acrylic fiber was manufactured through wet-spinning in a dimethyl formamide (DMF) system. The conditions of wet-spinning were investigated by i-value, spinning speed, diameter of spinneret, draw ratio, water content of spinning dope and morphology of protofiber. The physical properties of fibers were investigated by Instron. In this experiment, the minimum i-value decreased with the decreasing spinneret diameter, an increased spinning speed, and an increased coagulation bath (CBC) concentration. The maximum draw ratio increased with an increased CBC. The optimum CBC and water content of the spinning dope were 60%-65% and 3.5%, respectively. The tenacity at the breaking point increased with a decreased fineness of fiber. The elongation at breaking point was almost the same value as a function of the fineness of fiber.
Keywords
acryl fiber; coagulation; fine denier; i-value; wet-spinning;
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