Abstract

To obtain aromatic polyamides with reduced dielectric constant, a series of aromatic polyamide copolymers derived from the reaction between m-phenylenediamine to trans-1,2-cyclohexanediamine and isophthaloyl chloride were synthesized using the low-temperature solution polymerization in the presence of 2-methylpyridine. The influence of the content of trans-1,2-cyclohexanediamine on the structure and properties of aromatic copolyamides was evaluated. With increasing the content of trans-1,2-cyclohexanediamine, the inherent viscosities of copolymers decrease from 1.95 to 1.14 dL/g. The copolymer with 25 mol % of trans-1,2-cyclohexanediamine has a reduced dielectric constant ε_r of 4.61 at 1 MHz, which is 26% lower than homopolyamide. Meanwhile, as-synthesized aromatic polyamides and copolyamides show good thermal stability and mechanical properties.

中文翻译：

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介电常数降低的芳香族聚酰胺共聚物的合成

摘要

以获得具有降低的介电常数的芳香族聚酰胺，一系列从反应之间的芳族聚酰胺共聚物的米苯二胺向反式-1,2-环己二胺和间苯二甲酰氯使用低温溶液聚合在2-甲基吡啶的存在下，合成. 评价了反式-1,2-环己二胺含量对芳香族共聚酰胺结构和性能的影响。随着反式-1,2-环己二胺含量的增加，共聚物的特性粘度从1.95降低到1.14 dL/g。含有 25 mol %反式-1,2-环己二胺的共聚物具有降低的介电常数 ε _r1 MHz 时为 4.61，比均聚酰胺低 26%。同时，合成的芳香族聚酰胺和共聚酰胺显示出良好的热稳定性和机械性能。