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http://dx.doi.org/10.12772/TSE.2019.56.242

Structure and Properties of Heat-treated p-Aramid Fibers Containing Cyano Groups  

Lee, Il Jae (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University)
Jang, Eun Ji (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University)
Cha, Hwa Hyun (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University)
Baik, Doo Hyun (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University)
Publication Information
Textile Science and Engineering / v.56, no.4, 2019 , pp. 242-247 More about this Journal
Abstract
Poly(p-phenylene terephthalamide) (PPTA) and poly(2-cyano-1,4-phenylene terephthalamide) (CNPPTA)-based aramid copolymers were synthesized using a low-temperature polycondensation reaction between terephthaloyl chloride; 2-cyano-1,4-phenylene diamine, and/or 1,4-phenylene diamine in N,N-dimethylacetamide (DMAc). The aramid homopolymer and copolymers were dry-jet wet spun from the spinning dopes, which consisted of 13 wt% polymer and DMAc. Both the tensile strength and tensile modulus of the spun aramid fibers containing 60 mol% of 2-cyano-1,4-phenylene diamine were found to be enhanced by heat treatment. Wide-angle x-ray diffraction analysis revealed that crystallinity and crystal orientation were increased by heat treatment, which resulted in increased tensile strength and modulus. The effects of heat treatment on the tensile properties of aramid fibers have been studied by the concept of structure-property relations.
Keywords
aramid fibers; cyano group; heat-treatment; WAXD; tensile properties;
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Times Cited By KSCI : 2  (Citation Analysis)
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