This work aimed at effectively utilizing the chemically depolymerized waste poly（ethylene terephthalate）（PET） fibers into useful products for the textile industry.PET fibers were glycolytically degraded by excess ethylene glycol as depolymerizing agent and zinc acetate dihydrate as catalyst.The glycolysis product,bis（2-hydroxyethyl） terephthalate（BHET）,was purified through repeated crystallization to get an average yield above 80%.Then,BHET was nitrated,reduced,and azotized to get diazonium salt.Finally,the produced diazonium salt was coupled with 1-（4-sulfophenyl）-3-methyl-5-pyrazolone to get azo dyestuff.The structures of BHET and azo dyestuff were identified by FT1 R and ^1H NMR spectra and elemental analysis.Nylon filaments dyed by the synthesized azo dyestuff with the dye bath pH from 4.14 to 5.88 showed bright yellow color.The performances of the dyestuff were described with dye uptake,color fastness,K/S,L^＊,a^＊,b^＊.and △E^＊ values.
设计制备了导电 TiO 2材料，使用（NaPO 3）6对其进行表面活性处理，并与聚酰胺（PA）混合造粒，再经熔融纺丝制备了一种白色导电纤维。测试表明经处理的导电 TiO 2材料可以很好地分散于 PA 基体中且相容性良好，纺出的纤维具有良好的导电性能。对其导电机理进行了研究，结果表明当导电 TiO 2含量＜7％时属于隧道导电，含量为10％~13％时属于隧道导电和欧姆导电组合导电，含量＞13％时以欧姆导电为主。
