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Contrast enhancement and polymer identification in the electron microscope by the formation and staining of unsaturated double bonds

✍ Scribed by M. A. Parker; Dr. D. Vesely

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
757 KB
Volume
24
Category
Article
ISSN
1059-910X

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✦ Synopsis

A new technique for the identification of phases contained within a polymer blend is described in this paper. The technique utilises the beam damage which occurs when polymers are irradiated in an electron microscope. It has been found that during the irradiation process isolated double bonds are formed which can be revealed by staining with osmium tetroxide. The density of staining and its relationship to electron exposure is shown to be a characteristic feature of a particular chemical structure. It allows for polymer phase identification with a high spatial resolution and also for contrast enhancement and preservation. This technique offers a unique way of studying a fine dispersion of phases in polymer blends, even where only low atomic number elements such as C, H, and 0 are present.

Beam damage, Irradiation effects, Osmium tetroxide, Polymer blends o 1993 Wiley-Liss, Inc.

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