NETWORK FORMATION STUDIED BY TEMPERATURE SCANNING BRILLOUIN-SCATTERING AND DIFFERENTIAL SCANNING CALORIMETRY TECHNIQUES .1. THE CURE OF 1,4-BUTANEDIOL DIGLYCIDYL ETHER WITH CIS-1,2-CYCLOHEXANEDICARBOXYLIC ANHYDRIDE INITIATED BY TRIETHYLAMINE

The network formation process of the triethylamine-initiated reaction of 1,4-butanediol diglycidyl ether with cis-1,2-cyclohexanedicarboxyli c anhydride has been investigated by conventional differential scannin g calorimetry and temperature scanning Brillouin light scattering as a new experimental method far the estimation of the reaction's conversi on factor. The time-temperature evolution of the observed quantities ( reaction enthalpy in the calorimetric measurements and hypersound velo city in the light scattering) reflects in both sets of experimental da ta, but results in different kinetic parameters obtained by the assump tion of an Arrhenius behavior. These differences are ascribed to the r elation of the observed properties with respect to the evolution of th e reaction. The enthalpy production of the system observed in the calo rimetric experiment is shown to be connected directly to the chemical reaction, whereas the change in the hypersound velocity measured by th e light scattering method is sensitive to the solidification of the sy stem. (C) 1995 John Wiley and Sons, Inc.