Structure of Epoxy Polymers

It is considered that is determined by the properties of the supermolecular structure of epoxy polymers, namely, by the degree of local order in them. This assumption arises due to the well-known succession of relationships between the diffusion process and d [28], between the diffusion process and the fluctuation free volume [119], and between and the cluster structure [120]. Therefore, the fractal dimension of the cluster structure of crosslinked polymers [105, 110], estimated from Equation (11.27), is taken to be d. Since the D value is determined for an Euclidean space with d = 2, it was also assumed in Equation (11.27) that d = 2. The d value was found for a three-dimensional space therefore, a graph [121] for converting d from three- to two-dimensional space was used in subsequent calculations. The D values were further calculated from Equation (11.8) in terms of the AO and AS hypotheses. Figure 11.13 shows the dependences of D on calculated from Equations (11.8) and (11.39). The dependences of D on and the absolute magnitudes of D are in good agreement, especially when the AO hypothesis is used. 

Thus, the fractal dimension of a section of the macromolecule between chemical crosslinking points in network polymers varies over limits close to those predicted for a fractal broken line, i.e., 1molecular mobility and is related to the fractal dimension of the cluster structure of epoxy polymers... 

One point of the model under discussion is estimation of the relationship between v and the level of local order in the structure of epoxy polymers, which is characterised by the... 

TABLE 9.2 The Adaptability Critical Characteristics of Structure of Epoxy Polymers with Different Curing Agents Before and After Yielding [20]... 

Application of Wide Angle X-ray Diffraction for Study of the Structure of Epoxy Polymers... 

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