RESIXOGRAPHY 



240. Harned, B. W., and Ginsberg, N., "Anal- 



ysis of Interference Fringes From a Flame," 

 /. Opt. Soc. Am., 48(3), 178-183 (1958). 



241. Candler, C, "]\Iodern Ipterferometers," 



Hilger and Watts, Ltd., publ. London, 

 1951. 



242. Tolansky, S., "An Introduction to Inter- 



ferometry," Longmans, Green and Co., 

 London, 1954. 



243. Ditchburn, R. W., "Light," Interscience, 



New York, 1952. 



244. Jones, C. R., "On Reversibilitj' and Irrevers- 



ibility in Optics," /. Opt. Soc. Am., 43(2), 

 138-144 (1953). 



R. JONNAED 



Resinography 



Definitions and Scope 



Resinography, as the name impHes, is the 

 graphic part of the study of resins. The term 

 "resin" stands for natural resins, such as 

 rosin, and also for high polymers. High poly- 

 mers may be natural, regenerated, modified 

 or synthetic; for examples, respectively: cot- 

 ton, viscose, cellulose acetate and polyacryl- 

 onitrile. High polymers may be thermoplas- 

 tic or thermoset. Characteristically a high 

 polymer is m the rubbery, glassy and/or crys- 

 talline state. Examples of exceptions are sili- 

 cone oil and its "bouncing putty." Inorganic 

 glasses, especially their fibers, may also be 

 studied resinographically. 



Resinography is an integral part of the 

 analytical and synthetical studies of such 

 materials. For examples, as discussed later 

 in more detail regarding Figure 8, a resin was 

 found to have higher impact strength than 

 could be fully explained by the chemical- 

 physical history. Resinographic examination 

 revealed the presence of two coexistent phys- 

 ical phases. Their separate properties and the 

 effects of their combination were correlated 

 with the sizes, shapes and distributions of the 

 physical phases as well as with the over-all 

 chemical composition. 



Resinographic studies are made not only 

 on static samples but also on dynamic ones. 

 That is, behavior is studied as well as archi- 

 tectural design and construction. All parts 

 of the complete, cyclic studies are not only 



connected but interrelated as suggested in 

 Figure 1. 



The term "resinography" is analogous to, 

 but distinct from "metallography" and from 

 studies of other plastic materials such as 

 metals, waxes, mastics and plasters. The 

 analogy stems from similarities and distinc- 

 tions among properties and methods of 

 fabrication. "Continents," boundaries and 

 "bridges" in the world of plastic materials 

 are fancifully mapped in Figure 2. 



Resins and high polymers like the other 

 plastic materials suggested in Figure 2 are 

 characterized by properties which permit 

 manufacture by plastic deformation such as 

 pressing, pushing, pulling, pounding, plait- 

 ing, punching, pinching, pruning, planing, 

 polishing, pasting, plastering, or packing 

 into position. 



Fig. 1. Some facets of resinography. 



525 



