Fedors-type cohesive energy

Fedors-type cohesive energy /i ch correlated best with dielectric constant. 

Fedors-type cohesive energies of hydrocarbon polymers... 

B.3. Fedors-Type Cohesive Energies of Hydrocarbon Polymers... 

Table 17.4. Comparison of the predictions made by using the general-purpose correlation (Equations 5.10-5.12), and the designer correlation (Equation 17.3), for the Fedors-type cohesive energies Ecohi of seven polymers. Each one of these polymers contains a structural unit whose group contribution to Ecoll(Fedors) is not listed. The group contribution table of Fedors cannot, therefore, itself be used to calculate Ecoh(Fedors) for any of these polymers.

Polymer Fedors-Type Cohesive Energy Ecoj,i (J/mole) ... 

For example, the correlation using connectivity indices for the Fedors-type cohesive energy gives Eco[1]= 79577 J/mole for poly(a-naphthyl methacrylate) and 84518 J/mole for poly(a-... 

Askadskii has shown that Fedors assumption that the contributions of atoms or groups of atoms are additive is not quite correct because the same atom in different groups occupies different volume. In addition, atoms can interact with each other in a different way depending on their arrangement within the molecular stracture. These influences were taken into account to increase the precision of the computation of the cohesion energy in a new calculation method for solubility parameters. This takes into a consideration the enviromnent of each atom in a molecule and the type of intermolecular interaction. 

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