A new diamine containing hydroxyl and bis-tert-butyl substituted triphenylpyridine units was synthesized and used in the synthesis of polyimides (PIs) via a one-step polymerization. The diamine and PIs were characterized by FTIR and ¹H-NMR. The aggregated structure of PIs was amorphous by wide angle X-ray diffraction test and all of them exhibited excellent solubility in most organic solvents. The bis-tert-butyl and triphenylpyridine units endowed PIs excellent thermal stability with 10% weight loss temperatures in the range 493–525 °C and high glass transition temperature in the range 301–344 °C, while the existence of hydroxyl groups provided the possibility for further modification of polymer. The PI membranes had excellent mechanical properties with tensile strength in the range 65–93 MPa. The density of PIs was lower with density in the range 1.266–1.289 g/cm³. It was foreseeable that PIs will greatly promote the applications of heat-resistant and lightweight PI materials in the future.

合成了一种新的含有羟基和双叔丁基取代的三苯基吡啶单元的二胺，并通过一步聚合将其用于聚酰亚胺（PI）的合成。FTIR和¹表征了二胺和PI1 H-NMR。通过广角X射线衍射测试，PI的聚集结构是无定形的，并且它们在大多数有机溶剂中均表现出优异的溶解性。双叔丁基和三苯基吡啶单元赋予PI优异的热稳定性，失重温度在493-525°C范围内为10％，玻璃化转变温度在301-344°C范围内，而羟基的存在提供了良好的热稳定性。聚合物进一步改性的可能性。PI膜具有出色的机械性能，拉伸强度范围为65-93 MPa。PI的密度较低，密度在1.266–1.289 g / cm ³的范围内。可以预见，PI将来将极大地促进耐热和轻质PI材料的应用。