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首页> 外文期刊>RSC Advances >Synthesis and properties of soluble aromatic polyimides from novel 4,5-diazafluorene-containing dianhydride
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Synthesis and properties of soluble aromatic polyimides from novel 4,5-diazafluorene-containing dianhydride

机译：含新4,5-二氮杂氟二酐的可溶性芳族聚酰亚胺的合成与性能

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摘要

A series of organo-soluble, high glass transition temperature (T-g), and low dielectric constant aromatic polyimides containing 4,5-diazafluorene in the polymer chain were synthesized from a novel dianhydride monomer, 9,9-di[4-(3,4-dicarboxyphenoxy)phenyl]-4,5-diazafluorene dianhydride. The introduction of 4,5-diazafluorene units improved the solubility of aromatic polyimides in commonly used organic solvents, and even in dichloromethane, 1,4-dioxane and tetrahydrofuran. The obtained polyimide films also exhibited excellent thermal stability with T-g between 270 degrees C and 311 degrees C, and decomposition temperatures at 10% weight loss (T-10%) between 493 degrees C and 552 degrees C. Moreover, the 4,5-diazafluorene-containing polyimides showed low dielectric constant located between 2.78 and 3.38, good mechanical properties with tensile strength between 92 and 105 MPa and elongations at break in the range of 4.49-24.8%.
机译：一系列有机溶性，高玻璃化转变温度（Tg）和聚合物链中含有4,5-二氮杂芳烃的低介电常数芳族聚酰亚胺是由新的二酐单体，9,9-DI [4-（3， 4-二羧基氧基）苯基] -4,5-二氮杂芳烃二酐。 4,5-二氮杂芳烃单元的引入改善了芳族聚酰亚胺在常用的有机溶剂中的溶解度，甚至在二氯甲烷，1,4-二恶烷和四氢呋喃中。 所得的聚酰亚胺膜还具有优异的热稳定性，Tg在270℃和311℃之间，分解温度为10％重量损失（T-10％），在493℃和552℃之间。此外，4,5- 含二聚胺的含二聚胺显示出低介电常数，位于2.78和3.38之间，良好的机械性能，抗拉强度在92至105MPa之间，伸长率在4.49-24.8％的范围内。

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  • 来源
    《RSC Advances》 |2018年第1期|共12页
  • 作者

    Deng Bo; Zhang Shujiang; Liu Chang; Li Wei; Zhang Xiangdong; Wei Hua; Gong Chenliang;

  • 作者单位

    Lanzhou Univ Coll Chem &

    Chem Engn State Key Lab Appl Organ Chem Lanzhou 730000 Gansu Peoples R China;

    Lanzhou Univ Coll Chem &

    Chem Engn State Key Lab Appl Organ Chem Lanzhou 730000 Gansu Peoples R China;

    Lanzhou Univ Coll Chem &

    Chem Engn State Key Lab Appl Organ Chem Lanzhou 730000 Gansu Peoples R China;

    Lanzhou Univ Coll Chem &

    Chem Engn State Key Lab Appl Organ Chem Lanzhou 730000 Gansu Peoples R China;

    Lanzhou Univ Coll Chem &

    Chem Engn State Key Lab Appl Organ Chem Lanzhou 730000 Gansu Peoples R China;

    Lanzhou Univ Coll Chem &

    Chem Engn State Key Lab Appl Organ Chem Lanzhou 730000 Gansu Peoples R China;

    Lanzhou Univ Coll Chem &

    Chem Engn State Key Lab Appl Organ Chem Lanzhou 730000 Gansu Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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