Molecular Structure of Interphases between DGEBA/BTDA Adhesives and Silver Substances Using Surface-Enhanced Raman Scattering.

摘要

Surface-enhanced Raman scattering (SERS) was used for the non-destructive characterization of interphases between epoxy/anhydride adhesive systems and silver substrates. Normal Raman spectra of benzophenone tetra-carboxylic dianhydride (BTDA) were characterized by strong bands near 1785 and 1860 1/cm that were assigned to the anhydride groups, a strong band near 1690 1/cm that was assigned to the benzophenone C=O stretching mode, and by a strong band near 1620 1/cm that was attributed to vibration and to the benzophenone C=O stretching mode were prominent in the SERS spectra of BTDA but the bands related to the anhydride group were missing, indicating that the anhydride groups were hydrolyzed at the silver surface to form carboxylate groups. Keywords: Raman scattering, Surface-enhanced, Adhesives, Epoxy/Anhydride, Benzophenone, Tetra carboxylic, Dianhydride, Diglycidyl, Ether, Ether of bisphenol-A, Interphases, Durability, SERS, BTDA, DGEBA, Molecular structures. (JG)