摘要
The acid-groups functionalized carbon nanotubes (Acid-CNTs)/poly(acrylonitrile-co-itaconic aicd) (P(AN-co-IA)) composite microspheres were synthesized by aqueous deposited polymerization. The effects of acid-CNTs on the structural evolution and cyclization kinetics of the P(AN-co-IA) copolymer were investigated by Fourier transform infrared spectroscopy (FTIR) and isothermal differential scanning calorimetry (DSC). Results from FTIR spectra revealed that the acid-CNTs/P(AN-co-IA) composite microspheres had lower content of ladder structure than that of the P(AN-co-IA) copolymer, suggesting that acid-CNTs impeded the cyclization reaction of nitrile groups. Moreover, the kinetics parameters coming from the DSC indicated that the acid-CNTs had significantly decreased the value of activation energy for cyclization reaction. The n-th order of cylization calculated through Kissinger method and Crane method was close one.