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首页> 外文期刊>Polymers for advanced technologies >Synthesis and characterization of new soluble thermally stable poly(azomethine-etherimide)s: discerning the possibility for high temperature applications
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Synthesis and characterization of new soluble thermally stable poly(azomethine-etherimide)s: discerning the possibility for high temperature applications

机译：新型可溶性热稳定聚（偶氮甲碱-醚酰亚胺）的合成与表征：识别高温应用的可能性

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摘要

A new series of polyimides was synthesized by the condensation of monomers (azomethine-ether diamine, DA-1 and DA-2) with pyromelliticdianhydride (PMDA), 3,4,9,10-perylenetetracarboxylic dianhydride (PD) and 3,3'4,4'-benzophenonetetracarboxylic dianhydride (BD). The structural explications of monomers and polyimides was conducted by FT-IR, H-1 NMR and elemental analysis. All polyimides were found soluble in polar aprotic solvents and found to be semicrystalline in nature confirmed by XRD. The inherent viscosities were found in the range of 0.67-0.77 g/dl. %. Average molecular weight (MW) and number average molecular weight (Mn) of the polyimides were found in the range of 5.72 x 10(5) g/mol-6.58 x 10(5) g/mol and 3.79 x 10(5) g/mol 4.11 x 10(5) g/mol respectively. The polyimides exhibited excellent thermal properties having a glass transition temperature T-g in the range of 230-290 degrees C and the 10% weight loss temperature was above 450 degrees C. The values of thermodynamic parameters, activation energy, enthalpy and entropy fall in the range of 45.2-53.90 kJ/mol, 43.5-52.30 kJ/mol and 0.217 kJ/mol k to 0.261 kJ/mol k respectively. Copyright (C) 2015 John Wiley & Sons, Ltd.
机译：通过将单体（偶氮次甲基醚二胺，DA-1和DA-2）与均苯四酸二酐（PMDA），3,4,9,10-per四羧酸二酐（PD）和3,3'缩合，合成了一系列新的聚酰亚胺4,4'-二苯甲酮四羧酸二酐（BD）。通过FT-IR，H-1 NMR和元素分析进行​​单体和聚酰亚胺的结构说明。发现所有聚酰亚胺可溶于极性非质子溶剂，并通过XRD证实其性质为半结晶。发现比浓对数粘度为0.67-0.77g / dl。 ％。聚酰亚胺的平均分子量（MW）和数均分子量（Mn）为5.72 x 10（5）g / mol-6.58 x 10（5）g / mol和3.79 x 10（5）g / mol分别为4.11 x 10（5）g / mol。所述聚酰亚胺表现出优异的热性能，其玻璃化转变温度Tg在230-290℃的范围内，并且10％的失重温度在450℃以上。热力学参数，活化能，焓和熵的值均在该范围内。分别为45.2-53.90 kJ / mol，43.5-52.30 kJ / mol和0.217 kJ / mol k至0.261 kJ / mol k。版权所有（C）2015 John Wiley＆Sons，Ltd.

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