Polarized optical micrographs resin

Figure 2.12 Photographs of polymer crystalline structures a) optical photograph of PP resin using polarizing light and filters, and b) electron micrograph of sPS resin (courtesy of Robert C. Cieslinski of The Dow Chemical Company)...

Microscopy. The polarized optical micrographs of thin films of HX-205 and F-185 neat resins were obtained using a Zeiss ultraphot microscope equipped with a polarizer and an analyzer. Thin films, approximately 100 microns thick, were prepared by thln-sectlonlng the resin sheet with a razor blade at room temperature. The domains were observable because of light scattering as a result of refractive Index mismatch between the rubber domain and the epoxy matrix, as well as to stress-induced birefringence produced by the thermal stress Imposed on the domains. 

Polarized optical micrographs obtained from thin films of HX-205 and F-185 neat resins. The magnification Is 224. The size of the largest domains Is about 45 pm. 

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