Ionic Polymers Subject to Bond Interchange

Viscoelasticity of Ionic Polymers Subject to Bond Interchange (2i, 22) 

In most non-crystalline linear polymers described to date, the relaxation mechanism (in the absence of such extraneous factors as degradation) is the simple molecular flow, or the a mechanism. Exceptions have been found, for instance in the case of the polysulfides (4,54,56,57) or pol5mrethanes (57) in which far above the gla transition temperature a ixmd interchange mechanism was observed. For a number of reasons (which will be described below), it is of interest to study viscoelasticity of polymers which are subject to both mechanisms, i. e., a and (as bond-interchange will be called due to the intrinsically chemical nature of the reaction), particularly if both mechanisms occur with comparable relaxation times. Among the benefits of such a study, particularly in the case of the ionic inorganic polymers would be  

An improvement in our understanding of the molecular basis of transport processes in complex systems, such as those encountered in the modified network-glasses or novel inorganic polymers. 

An elucidation of the chemistry in the non-crystaUine solid state in which ions are active in the bond interchange process both kinetics and mechanistic aspects should be induded. 

The application and development of techniques for the separation of the various mechanisms occurring simultaneously. 

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