Dyes as microscopic probes in polymers
Topography and fluorescence images of coloured polymer blends PS/PMMA. The polymers
were spin coated on a glass substrate from a dyed (R6G) solution. R6G is good soluble in
PMMA, but only slightly soluble in PS. With AFM techniques, a distinction between both
polymers would hardly be possible, especially if the surface is totally covered by one
polymer, as shown in the pictures below.
Topography and fluorescence images of coloured polymer blends (PS/PMMA 50/50). The
polymers were spin coated on a glass substrate from a dyed (R6G) solution. R6G is good
soluble in PMMA, but only slightly soluble in PS. The dewetting structures are very
sensitive to the molecular weights of the polymers.
Topography and fluorescence images of spherolytes in polypropylene. The spherolytes
were grown from solution.The dye is not soluble in the crystalline and amorphous regions
of the spherolytes and is only visible in the grain boundaries.
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