Fast and highly efficient one-pot synthesis of polyoxadiazole/carbon nanotube nanocomposites in mild acid

作者：Loos Marcio R^*; Abetz Volker; Schulte Karl

来源：Polymer International, 2011, 60(3): 517-528.

DOI：10.1002/pi.2983

• polyoxadiazoles
• in situ polymerization
• carbon nanotubes
• nanocomposites
• mechanical properties
• high-performance polymers

Sulfonated poly(4,4'-diphenylether-1,3,4-oxadiazole) (POD) composites have been successfully prepared through solution polycondensation of 4,4'-diphenylether dicarboxylic acid and hydrazine sulfate. The reactions were performed in the presence of various types of pristine carbon nanotubes, i.e. single-, double-and multi-walled carbon nanotubes, using mild poly(phosphoric acid) as a condensing agent. The POD composites with high molecular weight (of the order of 10(5) gmol(-1)) were highly soluble in polar aprotic solvents and thermally stable at temperatures as high as 475 degrees C. The synthesis method used guaranteed an improved interaction between filler and matrix, thus allowing an enhanced load transfer. The overall performance of the composites was enhanced due to a synergistic reinforcement effect. The nanocomposites exhibited an increase of +33% in storagemodulus, +56% in tensile strength and +245% in tensile energy to break.

• 出版日期2011-3