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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：新型含4,5-二氮杂芴的二酐的可溶性芳族聚酰亚胺的合成及性能

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摘要

A series of organo-soluble, high glass transition temperature (Tg), 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 Tg between 270?°C and 311 °C, and decomposition temperatures at 10% weight loss (T10%) between 493 °C and 552 °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：一系列有机可溶的，高玻璃化转变温度（ T g ）和低介电常数的含4,5-二氮杂芴的芳族聚酰亚胺该聚合物链是由一种新型的二酐单体9,9-二[4-（3,4-二羧基苯氧基）苯基] -4,5-二氮杂芴二酐合成的。 4,5-二氮杂芴单元的引入提高了芳族聚酰亚胺在常用有机溶剂中，甚至在二氯甲烷，1,4-二恶烷和四氢呋喃中的溶解度。所得的聚酰亚胺薄膜还表现出优异的热稳定性， T g 在270°C至311°C之间，分解温度为10％重量493°C至552°C之间的损耗（ T 10％ ）。此外，含4，5-二氮杂芴的聚酰亚胺显示出较低的介电常数，介于2.78至3.38之间，良好的机械性能，拉伸强度介于92至105 MPa之间，断裂伸长率为4.49-24.8％。

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