The technical information magazine The TRC News provides the latest information on analytical techniques that are useful for research and development, solving production troubles, and quality control.
**Abstract** Differential Phase Contrast (DPC) - Scanning Transmission Electron Microscopy (STEM), one of the measurement techniques of STEM, enables the measurement of electric fields at microscopic regions. By applying this method to polymer alloys, we discovered that contrast of phase separation structures, which are difficult to observe with conventional electron microscopy, emerges. **Table of Contents** 1. Introduction 2. Visualization of Soft Materials through Elemental Analysis 3. Application of DPC-STEM Method 4. Conclusion
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Technical Information Magazine The TRC News "Analysis of Polymer Phase Separation Structures Using DPC-STEM" 【Abstract】 Differential Phase Contrast (DPC)-STEM, a measurement technique of Scanning Transmission Electron Microscopy (STEM), enables the measurement of electric fields at microscopic levels. We discovered that applying this method to polymer alloys reveals contrasts of phase separation structures that are difficult to observe with conventional electron microscopy. 【Table of Contents】 1. Introduction 2. Visualization of Soft Materials through Elemental Analysis 3. Application of DPC-STEM Method 4. Conclusion 【Figures and Tables】 Figure 1: TEM image of ABS resin, a polymer alloy composed of acrylonitrile-styrene copolymer (AS) and butadiene rubber (BR) Figure 2: TEM images of a typical polyurethane after RuO4 electron staining and a hard polyurethane after RuO4 electron staining Figure 3: HAADF-STEM image of unstained ABS resin and EDX maps of N, Mg, Ca Figure 4: Schematic diagram of the measurement principle of DPC-STEM Figure 5: HAADF-STEM image of unstained ABS resin, electric field distribution measured by DPC-STEM, and potential distribution calculated from the electric field distribution
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