TY - JOUR
AU1 - Wu, Yuane
AU2 - Chen, Gong
AU3 - Feng, Chen
AU4 - Yang, Jiping
AB - To provide high‐temperature polyimide matrix resins, novel carborane‐containing thermosetting polyimides are presented. First, the low‐viscosity carborane‐containing imide oligomers are synthesized using newly designed 1‐(3‐amino‐4‐tolyl)‐2‐(4‐aminophenyl)‐o‐carborane and aromatic dianhydride as monomers, 4‐phenylethynyl phthalic anhydride as the end‐capping reagent. Followed by thermal curing, the resulting polyimides show high Tg (≥500 °C) and above 92.1% char yield at 800 °C both in nitrogen and air atmosphere due to the incorporation of the bulky carborane cages. Aging studies, performed at 400 and 500 °C for 5 h in air on a carborane‐containing polyimide and a carborane‐free polyimide, show that the polyimide with carborane groups possesses excellent thermo‐oxidative stability. Moreover, the novel polyimides exhibit constant and relatively low coefficient of thermal expansion values over a wide range of temperature, indicative of a remarkable dimensional stability. Thus, this study clearly demonstrates the viability of the incorporation of carborane cages to access polyimide thermosets with ultrahigh Tg and thermo‐oxidative stability.
TI - High Tg and Thermo‐Oxidatively Stable Thermosetting Polyimides Derived from a Carborane‐Containing Diamine
JF - Macromolecular Rapid Communications
DO - 10.1002/marc.201800484
DA - 2018-11-01
UR - https://www.deepdyve.com/lp/wiley/high-tg-and-thermo-oxidatively-stable-thermosetting-polyimides-derived-iLJEKcxyp5
SP - n/a
EP - n/a
VL - 39
IS - 21
DP - DeepDyve
ER -