科研之友
微信
新浪微博
Facebook
分享链接
摘要
Two similar macrocycles protoporphyrin IX and zinc protoporphyrin IX (ZPP) have been used as cross-linking agents for curing the epoxy resin of bisphenol A diglycidyl ether (BADGE, n=0). The enthalpies and the activation energies of the esterification reaction of the 2 systems are very close to each other. However, the temperature of the minimum in the differential scanning calorimetry thermogram is 38 degrees C lower for BADGE (n=0)/ZPP, thus requiring a less energy expenditure for curing the system. By the contrary, the enthalpy and activation energies for the etherification reaction are lower and higher, respectively, for BADGE (n=0)/ZPP suggesting that the zinc ion affects it, although the involved mechanism is unknown.
- 出版日期2018-1
