文献类型：期刊文献

中文题名：高纯 4,6-二氨基间苯二酚盐酸盐的制备及聚合应用

英文题名：Preparation of high-purity 4,6-diaminobiphenol hydrochloride salt and its polymerization application

作者：Xu, Xiaoqin[1]; Li, Xinxin[1]; Liu, Feng[2]; Teng, Peng[2]; Pan, Zhijun[2]

机构：[1] Key Laboratory of Specially Functional Polymeric Materials and Related Technology, Ministry of Education, School of Materials & Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Zhejiang Dragon Technology Co., Ltd., Hangzhou, 311215, China

年份：2026

卷号：54

期号：6

起止页码：36

外文期刊名：Engineering Plastics Application

收录：EI(收录号：20262821065874)

语种：中文

外文关键词：Costs - Elastomers - Fibers - Fighter aircraft - Plastics - Spinning (fibers) - Sulfonation

摘要：: Poly(p-phenylene benzobisoxazole) (PBO) fiber exhibits excellent properties such as high strength, high modulus, and high-temperature resistance. The synthesis and stable large-scale preparation of low-cost and high-purity monomer, 4,6-diamino-biphenol (DAR),are the key technologies that restrict its development for high-performance PBO fibers. Driven by national strategic demands, resorcinol was employed as the starting material to prepare high-purity 2, 4-dinitroresorcinol (DNR) through a comprehensive one-pot process involving sulfonation, nitration, and hydrolysis reactions. Subsequently, high-purity 4, 6-diaminoresorcinol dihydrochloride (DAR·2HCl) was obtained via catalytic hydrogenation reduction using 5%Pt/C as the catalyst, followed by stabilization through hydrochloride salt formation, which was then used for polymerization and fiber spinning. The effects of reaction parameters, including raw material ratio, temperature, and reaction time, on the preparation of DNR and DAR were systematically investigated. Under the optimized conditions, the purity of DNR reaches 99.5%, while that of DAR reaches 99.8%, demonstrating a stable, efficient, and cost-controllable monomer preparation process. Furthermore, using polyphosphoric acid as the reaction solvent, DAR and terephthalic acid (PTA) were subjected to polycondensation to synthesize PBO polymer, which was subsequently spun into fibers via dry-jet wet-spinning technology. The results show that the PBO fibers prepared from the self-synthesized DAR monomer exhibit a tensile strength of 37 cN/dtex and a tensile modulus of 1 150 cN/dtex. ? 2026 Engineering Plastics Application Magazine. All rights reserved.