Hyperbranched Polyphosphate Ester/Diglycidyl Ether of Bisphenol-A Epoxy Hybrid Resin: Preparation, Curing, and Thermal Degradation Kinetics

摘要

Hyperbranched polyphosphate esters (HPPE) were synthesized from a dehydrochlorination reaction between 1,3,5-tris(2-hydroxyethyl)cyanuric acid (THEIC) and phosphorus oxychloride (POCl3). The curing processes of diglycidyl ether bisphenol A (DGEBA)/ hyperbranched polyphosphate esters (HPPE) hybrids were studied by non-isothermal differential scanning calorimetry. The thermal degradation mechanism of DGEBA/HPPE hybrids was studied by using the Coats-Redfern method. The effects of the content and molecular mass of the HPPE on the activation energy, reaction order and curing time were investigated. The obtained results indicated that HPPE can reduce the activation energy and accelerate the curing, and increase the heat resistance of epoxy resin.