119th General Meeting of the KCS

Type Symposium
Area Physical Chemistry of Materials
Room No. 304호
Time THU 15:30-:
Code PHYS1-6
Subject Chemical and Orientational Imaging of Complex Polymeric Materials by Broadband CARS Microscopy
Authors Young Jong Lee
National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA, Korea
Abstract Broadband coherent anti-Stokes Raman scattering (BCARS) microscopy can provide label-free chemical images of biological and soft materials systems, faster than conventional spontaneous Raman microscopy. I demonstrate that appropriate polarization control of the high throughput imaging modality can capture both chemical composition and molecular orientation of complex polymeric materials, unraveling new information on the structure and rheology on the molecular scale. As an example, I discuss a study of a polyethylene (PE) blend that approximates the typical bimodal PE products, used for potable water and natural gas pipes. The study results in several new findings, which are unavailable by other conventional imaging methods. I will discuss them with respect to the mechanical failure mechanisms under mechanical stress and temperature. This new quantitative chemical and orientational imaging technique will help to understand the fundamental physics of complex polymeric materials and improve their physical properties.
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