一类含芴结构改性聚芳酰胺的合成与性能研究

石油炼制与化工 ›› 2024, Vol. 55 ›› Issue (2): 207-212.

• 研究报告 • 上一篇

一类含芴结构改性聚芳酰胺的合成与性能研究

向艳丽,曹世杰,任强,李坚,汪称意

常州大学材料科学与工程学院

收稿日期:2023-11-20 修回日期:2023-11-27 出版日期:2024-02-12 发布日期:2024-01-29
通讯作者: 汪称意 E-mail:wangcy@cczu.edu.cn
基金资助:
江苏省高校基础科学（自然科学）研究重大项目

SYNTHESIS AND PROPERTIES OF POLYARAMIDES MODIFIED WITH FLUORINE STRUCTURE

Received:2023-11-20 Revised:2023-11-27 Online:2024-02-12 Published:2024-01-29

摘要/Abstract

摘要： 采用三步反应制备出含芴结构的二胺单体9,9-双[3,5-二甲氧基-4-(4-氨基-2-甲基苯氧基)苯基]芴，再通过低温溶液缩聚与4种商业化的芳香二酸[对苯二酸、2,2-双(4-羧基苯基)六氟丙烷、4,4-二苯醚二甲酸、4-叔丁基间苯二酸]反应得到系列含芴结构改性聚芳酰胺(PA 3a~3d)。利用核磁共振氢谱、傅里叶变换红外光谱、凝胶渗透色谱等方法对该聚芳酰胺的结构、溶解性、耐热性和力学性能进行表征。结果表明：含芴结构聚芳酰胺在高沸点极性溶剂(N,N-二甲基乙酰胺、N,N-甲基吡咯烷酮、二甲基甲酰胺、吡啶)和低沸点溶剂四氢呋喃中均能较好地溶解；玻璃化转变温度（T_g）在217~234 ℃之间，空气和N₂中的10%热失重温度均高于450 ℃，耐热性优异；其薄膜的拉伸强度在76.6 MPa以上，断裂伸长率在8.7%以上，表现出较好的力学性能；含芴结构聚芳酰胺表现出优异的综合性能。

关键词: 聚芳酰胺, 芴基, 热稳定性, 溶解性, 力学性能

Abstract: Firstly, a novel diamine monomer 9,9-bis (3, 5-dimethoxy-4-(4-amino-2-methylphenoxy) phenyl) containing fluorene was preparedby three-step organic reaction. This monomer was then used to synthesize a series of polyarylamides (PA 3a-3d) with fluorine by low-temperature solution condensation with four commercial aromatic diacids (terephthalic acid, 2, 2-bis (4-carboxyphenyl) hexafluoropropane,4, 4-diphenyl ether dicarboxylic acid, and 4-tert-butylisophthalic acid). The structure and properties of these polymers were characterized by ¹H NMR, FT-IR and GPC. The solubility, thermal properties, optical properties and mechanical properties of the polymers were investigated. The results showed that the polyarylamidescouldbe dissolved in high-boiling polar solvents such as DMAc, NMP, DMF, and pyridine and low-boiling point solvent THF. The glass-transition temperature T_g of these polymers ranged from 217℃ to 234℃. The 10% mass loss temperature in air and nitrogen were both above 450℃, indicating excellent thermal stability. The prepared films exhibited excellent mechanical properties, with tensile strength more than 76.6 MPa and elongation at break above 8.7%. These polymers with fluorene structures showed excellent comprehensive properties.

Key words: polyaramide, fluorenyl, thermostability, solubility, mechanical property

向艳丽曹世杰任强李坚汪称意. 一类含芴结构改性聚芳酰胺的合成与性能研究[J]. 石油炼制与化工, 2024, 55(2): 207-212.

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一类含芴结构改性聚芳酰胺的合成与性能研究

SYNTHESIS AND PROPERTIES OF POLYARAMIDES MODIFIED WITH FLUORINE STRUCTURE

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