Nanoscale Infrared Spectroscopy and AFM Imaging of a Polycarbonate/Acrylonitrile-Styrene/Butadiene Blend
An atomic force microscope and a tunable infrared laser source have been combined in a single instrument (AFM-IR) capable of producing 100-nm spatial resolution IR spectra and absorption images. This new capability enables the IR spectroscopic characterization of polymer blends at levels not previously possible. The AFM-IR technique was used to chemically characterize the morphology of polycarbonate/acrylonitrilestyrene/butadiene (PC/ABS) blends. These materials are often blended in different proportions to produce polymer alloys with superior impact strength, processability, and fire resistance. The results enabled the chemical identification of the different morphologies, including soft polybutadiene domains as small as 40 nm.
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