화학공학소재연구정보센터
Journal of Applied Polymer Science, Vol.54, No.9, 1297-1304, 1994
Characterization of Alicyclic Polyimides Based on Cyclobutane Ring Dianhydride and Aromatic Diamine
Films of alicyclic polyamic acid and polyimide containing cyclobutane ring in dianhydride moiety and aromatic ring with p- or m-linkages in diamine moiety were characterized by infrared (IR) spectroscopy, dynamic viscoelasticity, differential-scanning calorimetry (DSC), density, and wide-angle X-ray diffraction analyses. Partially and fully imidized polyimides were obtained by varying the imidization temperature, e.g., 150-degrees-C, 250-degrees-C, and 350-degrees-C. It was found from the results of IR spectra, dynamic viscoelasticity, and DSC measurements that the imidization of alicyclic polyamic acid was reduced at about 150-degrees-C and needed a higher imidization temperature than aromatic polyamic acid. Alicyclic polyimide with m-linkage in the diamine moiety had a higher density and a much more ordered structure than with p-linkage.