Determination of Apparent Activation Energy of Polymerization by Automatic Dielectrometry.

摘要

One phase of current efforts to improve the lap shear and thermal aging properties of metal-to metal structural adhesives was the examination of techniques to monitor the cure of resins. The information obtained during curing processes was to be employed to establish cure cycles or to modify existing cure programs to optimize adhesive properties. A search was made and a method was found and modified to allow a simplified calculation of the characteristic energy of the curing process and to reduce collected data to a common basis useful for comparison with other curing processes. In the report the experimental procedures and methods of calculation are described for the determination of the apparent activation energies of curing processes of polymeric systems by automatic dielectrometry. Selected topics included dielectrometry, epoxy resin systems, concept of activation or characteristic energy, and methods of calculation of activation energy.