STRUCTURE OF GELS 



8i 



TABLE XI 



(Compare Table II) 



RETICULAR SYSTEMS (ACCORDING TO FREY-WYSSLING, 1 93 yd) 



various different possibilities of orientation. This determines the 

 micellar texture, which gives information about the arrangement of 

 the structural elements in the gel, in contrast to the micellar structure, 

 which characterizes the fine-structure in general. 



Definitions. To sum up, we give the following survey: 

 By structure^ we mean the fixed mutual positions of the submicro- 

 scopic or amicroscopic morphological units ; by texture, the special 

 arrangement and distribution of such structural units. 



= colloids with freely moving particles 



= colloids with a gel frame 



= molecular colloid particles 



= supermolecular colloid particles, most often 



packets of chain molecules in parallel arrangement 

 == amicroscopic structure of intertwined cliain 



molecules 

 = submicroscopic structure of coherent micellar 



strands 

 = substances in the interstices of a molecular 



framework 

 = substances in the interstices of a micellar frame- 

 work 

 = processes occurring between the strands of a gel 



frame 

 = processes occurring inside the strands of a gel 



frame 

 = fine-structure of gels in general 

 = arrangement of the structural units in particular 



^ Not only crystalline but also amorphous solid phases possess a structure. For, in 

 amorphous glasses (Bussem and Weyl, 1936) and also in isotropic gels the structural 

 elements are bound together elastically in fixed mutual positions, notwithstanding the lack 

 of order. We must therefore in principle attribute a structure to ?11 solid states of matter. 



corpuscular colloids 

 reticular colloids 

 macromolecules 

 micelles 



molecular framework 



micellar framework 



interstitial substances 



intermicellar substances 



intermicellar processes 



intramicellar processes 



micellar structure 

 micellar texture 



