Kautschuk Gummi Kunststoffe, Vol.55, No.7-8, 382-387, 2002
Morphology of elastomer blends by dynamic AFM
The reduction in lateral forces during scanning allows the tapping-mode AFM to be an extremely useful tool for evaluating the morphology of elastomer blends. Without staining or etching, rubber/plastic domains and fillers in cryo-faced elastomer blends can be obtained by the tapping mode AFM with strong contrast. The change in phase shift provides the material contrast based on mechanical property variations among various blend components. Image processing and measurement of AFM micrographs ensure the proper phase assignment and can provide quantitative structural parameters in blends. Filler/processing oil partition in elastomer blends, compatibility and interfacial tensions between elastomers, and co-continuity in co-continuous elastomer blends can be measured. Applications of quantitative AFM morphological analysis to design better elastomer compounds are presented.