1·Polyimides are important high-performance polymers which can be made by thermal imidization and by chemical imidization of their precursors poly(amic acids).
聚酰亚胺是一类高性能的聚合物，它可由其前驱体聚酰胺酸经热或化学亚胺化而得到。
2·The monomers, synthesis methods and properties, especially optical properties, electrical properties, solubility and stability of fluoro-containing polyimides are introduced.
着重介绍了含氟聚酰亚胺的物理化学性质、光学和电学性能以及气体选择透过性。
3·Several methods for preparation and modification of silicon-containing polyimides were reviewed and the properties of the relevant products were also mentioned.
本文综述了含硅聚酰亚胺的合成和改性方法以及相应产物的性能特点。
4·The polymerization of fourteen N-phenyl unsaturated dicarboximides were studied for the selection of capping agents of "PMR" polyimides.
研究了十四种不饱和羧酸酐的N -苯基二酰亚胺的热聚合反应，以此作为“PMR”聚酰亚胺封端剂的选择。
5·The structure, solubility, intrinsic viscosity, optical and heat property of polyimides was determined by FTIR, NMR, DSC and TGA et al.
聚酰亚胺的结构经红外光谱和核磁共振氢谱确认，并对它的溶解性能、特征粘数、光学性能和热性能等进行了表征。