Industrial & Engineering Chemistry Research, Vol.54, No.17, 4717-4724, 2015
Nonisothermal Curing of DGEBA with Bloodmeal-based Proteins
Differential scanning calorimetry (DSC) was used to study the curing reaction of bisphenol A diglycidyl ether (DGEBA) and Novatein thermoplastic protein (NTP). NTP is made from bloodmeal and is similar to 60% protein. Activation energy (E-alpha), pre-exponential factor On A(o)) and order of reaction (m + n) were calculated using the Kissinger, model-free isoconversional and autocatalytic models. Curing kinetics were almost independent of concentration and the addition of plasticizers and protein denaturants to bloodmeal caused a decrease in E-alpha of similar to 50%. Increasing protein denaturants had little effect on the reaction; however, inclusion of salt proved detrimental. At NTP's maximum processing temperature (similar to 450 K), using an equal molar ratio of epoxy groups to reactive amino acids, 75% conversion can be reached in 3 min based on the modeling done here.