Aramids staining

This method continues to be used by the Leeds group. Dobb et ah (for instance, [187]) used the silver sulfide method to prepare new aramid fibers for TEM in order to evaluate the nature of the microvoids and to determine their influence on the tensile and compressive behavior of the fibers. The modification of the earlier method is the TEM image [182]. Figure 4.18 shows TEM images of latex particles prepared by staining... 

Another approach to the characterization of fiber microstructure is the isoprene inclusion method (Section 4.4.2.5). This was applied to the study of PET fibers [57] and to aramid fibers [58] for the purpose of showing their radial microporous and fibrillar texture. Any holes or voids are filled by inclusion of isoprene in the fiber. They are then stained by the reaction of osmium tetroxide with the included isoprene. Longitudinal sections of high speed spim PET are shown in the TEM micrographs in Fig. 5.15A and B of fibers before and after the reaction, respectively. Similar views at lower magnification were shown (Fig. 4.12) in... 

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