In this work, we synthesized polyimides by incorporating an aromatic diamine monomer with a methylene linker, 4,4'‐methylenebis(2,6‐dimethylaniline) (MBDMA), to make a robust main chain along with aliphatic polyetherdiamine backbone linkers to reduce rigidity. We designed the polymers to exhibit thermal properties in between those of conventional aromatic polyimides and polymers with wholly aliphatic ether diamine links. Through dynamic mechanical analysis and differential scanning calorimetry, it is shown that control of the molar ratios of the aromatic MBDMA (4,4'‐methylenebis(2,6‐dimethylaniline)) and the composition and size of the aliphatic polyetherdiamine can be used to tune the glass transition. The polymers were characterized by GPC, FTIR, NMR, thermomechanical and calorimetric analysis, and microhardness testing. POLYM. ENG. SCI., 59:221–232, 2019. © 2018 Society of Plastics Engineers

中文翻译：

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包含4,4'-亚甲基双（2,6-二甲基苯胺）和聚醚二胺的热塑性聚酰亚胺的热力学表征

在这项工作中，我们通过将芳香族二胺单体与亚甲基接头4,4'-亚甲基双（2,6-二甲基苯胺）（MBDMA）掺入来合成聚酰亚胺，以与脂肪族聚醚二胺主链一起形成坚固的主链，从而降低刚性。我们设计的聚合物表现出的热性能介于常规芳族聚酰亚胺和具有全脂族醚二胺键的聚合物之间。通过动态力学分析和差示扫描量热法，表明可以控制芳族MBDMA（4,4'-亚甲基双（2,6-二甲基苯胺））的摩尔比以及脂族聚醚二胺的组成和尺寸调整玻璃的过渡。通过GPC，FTIR，NMR，热力学和量热分析以及显微硬度测试对聚合物进行了表征。POLYM。ENG。SCI。，