Nano-matrix structure of a graft-copolymer consisting of deproteinized natural rubber (DPNR) and polystyrene (PS) was observed through field-emission scanning microscopy combined with a focused gallium (Ga) ion beam (FIB-SEM). The graft-copolymer was carefully stained with osmium tetraoxide for more than a week to avoid a charge-up through FIB-SEM. Field emission SEM images of the graft-copolymer were taken after etching its surface with the Ga ion at each interval and they were reconstructed to obtain the three-dimensional image of the nano-matrix structure. The NR particles of about 0.5 μm in diameter were found to be dispersed into the nano-matrix of PS, which connected to each other on all directions. The dimensional feature of the NR particles was dependent upon an expression of orthogonal views of the 3D image.
ASJC Scopus subject areas
- Physics and Astronomy(all)