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        基于一種含吡啶的氟化二胺的聚酰亞胺合成與性能
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        作者單位:

        1.東南大學 化學化工學院;2.東南大學化學化工學院

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        中圖分類號:

        TQ323.7

        基金項目:

        國家自然科學基金項目(21676054)


        Synthesis and properties of polyimides based on pyridine-containing fluorinated diamine
        Author:
        Affiliation:

        1.School of Chemistry and Chemical Engineering,Southeast University;2.School of Chemistry and Chemical Engineering, Southeast University

        Fund Project:

        The National Natural Science Foundation of China (21676054)

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          摘要:

          以對苯二酚為原料,依次與2-氯-5-硝基三氟甲苯和2-氯-5-硝基吡啶進行親核取代反應,還原后制備得到一種含吡啶雜環的氟化二胺單體6-{4-[4-氨基-2-(三氟甲基)苯氧基]苯氧基}吡啶-3-胺,并采用兩步法將其與二酐聚合,得到4種芳香族聚酰亞胺(PI)。對所得PI的溶解性、耐熱穩定性、光學性能、力學性能等進行表征。結果表明,基于4,4'-氧雙鄰苯二甲酸酐(ODPA)和六氟二酐(6FDA)的PI在常見有機溶劑中都有不錯的溶解性。N2氛圍下,這些PI的5 %、10 %熱失重溫度分別在548 ℃和566 ℃以上,玻璃化轉變溫度在226~290 ℃,具有良好的耐熱穩定性。這些PI薄膜有較好的光學透明度和力學性能,截止波長在382~438 nm,500 nm處的透過率在62 %~78 %,拉伸強度為98.3~110.5 MPa,彈性模量為1.86~2.14 GPa,斷裂伸長率為9~23 %。

          Abstract:

          A fluorinated diamine monomer containing pyridine, 6-(4-(4-amino-2-(trifluoromethyl) phenoxy) phenoxy) pyridin-3-amine, was prepared by nucleophilic substitution reaction with 2-chloro-5-nitrobenzotrifluoride and 2-chloro-5-nitropyridine in turn using hydroquinone as raw material and reduction. Four new polyimides (PI) were produced by the conventional two-step method with several dianhydrides. The solubility, thermal stability, mechanical properties, and optical properties of the resulting PIs were characterized. The results showed that the PIs based on 4,4’-oxydiphthalic anhydride (ODPA) and hexafluorodianhydride (6FDA) have outstanding solubility in common organic solvents. In N2 atmosphere, the temperatures of these polyimides with 5% and 10% weight loss are above 548 ℃ and 566 ℃, and the glass transition temperatures are between 226 and 290 ℃, which have excellent thermal stability. These PI films have good optical transparency and mechanical properties with cut-off wavelengths of 382~438 nm, transmittance at 500 nm of 62%~78%, tensile strength of 98.3~110.5 MPa, tensile modulus of 1.86~2.14 GPa, and elongation at break of 9~23 %.

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        薛超,肖國民,高李璟,張進,魏瑞平.基于一種含吡啶的氟化二胺的聚酰亞胺合成與性能[J].精細化工,2023,40(7):

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        歷史
        • 收稿日期:2022-10-21
        • 最后修改日期:2022-12-11
        • 錄用日期:2022-12-13
        • 在線發布日期: 2023-06-12
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