RESINOGRAPHY 



Table 1. Visible Units of Architecture in Polymers and Resins 



Fig. 3. Linseed oil in various stages of polymerization. Electron micrographs at same magnification, 

 showing particles of Type I. Self-supporting films, metal -shadowed simultaneously. 



coils, appendages and links generally are 

 not resolved. Nevertheless, information con- 

 cerning macromolecules has been obtained 

 which explained variations during synthesis 

 (8) and/or analysis (Figure 3). 



Demonstration of macromolecular bound- 

 aries is the least developed and most difficult 

 part of resinography. Besides the problems 

 of preparing specimens, obtaining and main- 

 taining highest electron microscopical visi- 

 bility, there are problems of interpreting 

 images near such limits and of explaining 



results which are practically or theoretically 

 unexpected. 



Type II. Many kinds of polymers manifest 

 colloidal sizes in connection with physical- 

 chemical history and practical properties 

 (Figures 5A and B). During polymerization, 

 gelation is often a step in the process and 

 colloidal particles are revealed microscop- 

 ically. The particulate boundaries apparently 

 are also involved in tests such as fracturing 

 (Figure 6) or etching and in performance 

 such as strength, wear and toughness. Sim- 



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