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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and properties of novel polyimides with side chains containing biphenyl units
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Preparation and properties of novel polyimides with side chains containing biphenyl units

机译：带有联苯单元侧链的新型聚酰亚胺的制备及性能

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摘要

Novel polyimides with side chains containing various methylene spacers and biphenyl end groups were prepared. They were characterized by the inherent viscosity, mechanical properties, and solubility and by Fourier transform infrared, H-1-nuclear magnetic resonance, Xray diffraction, differential scanning calorimetry, and thermogravimetric analysis. All the polyimides with biphenyl side groups could be formed into tough films. WAXD showed that all the films were apparently amorphous. By incorporating side chains, the solubility was greatly enhanced and all the polyimides with side chains showed good solubility in polar aprotic solvents, while the high moduli and strength of typical polyimides were maintained and even improved. However, the heat-resistant properties such as the thermal stability and glass transition temperature were generally decreased. (C) 2003 Wiley Periodicals, Inc. [References: 17]
机译：制备了具有包含各种亚甲基间隔基和联苯端基的侧链的新型聚酰亚胺。它们的特征在于比浓对数粘度，机械性能和溶解度，并具有傅立叶变换红外光谱，H-1核磁共振，X射线衍射，差示扫描量热法和热重分析。具有联苯侧基的所有聚酰亚胺都可以形成坚韧的膜。 WAXD表明所有的薄膜显然都是非晶态的。通过掺入侧链，可大大提高溶解度，并且所有带有侧链的聚酰亚胺在极性非质子溶剂中均显示出良好的溶解性，而典型聚酰亚胺的高模量和强度得以保持，甚至得到改善。但是，诸如热稳定性和玻璃化转变温度之类的耐热性通常降低。 （C）2003 Wiley Periodicals，Inc. [参考：17]

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