Nondestructive Molecular Characterization of Polycarbonate-Polyvinylamine Composites after Thermally Induced Aminolysis.

Thermal induced solid phase polymer reactions between bisphenol-A-based polycarbonate (PC) and polyvinylamine (PVAm) are used to form permanent composite material. The PC-PVAm interface is characterized by infrared (IR) spectroscopy. IR spectra of synthesized reference substances which can be expected after PC-PVAm reaction are recorded and used to identify amidation product structures within the PC-PVAm interphase. Curve fit analysis is performed to isolated sub-bands. The spectral position of the carbonyl absorption band is a suitable marker for the identification of different amidation products. While the formation of urethane and cyclic Allophanate points to the formation of a co-polymer cyclic Urea indicates a PC chain scission without binding between both polymer materials. [ABSTRACT FROM AUTHOR]