Abstract:

A new and comprehensive experiment for the preparation of safety and environmental protection materials was designed to meet the demand of the 14th Five-Year Plan (2021–2025) to train talents in higher education, promote the all-round development of students, strengthen the promotion of interdisciplinary subjects, and overcome the shortcomings of intuition, intersectionality, practice and innovation in traditional teaching experiments. A flame retardant (BMP) was synthesized, based on the reactivity of the P—H bond in the 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) structure by addition reaction with diphenylmethane bismaleimide (BMI). Thereafter, according to the principle of epoxy ring-opening and polymerization reactions, epoxy resin could be cured using a hardener. Additionally, the flame retardant epoxy resin was prepared by uniformly dispersing BMP into an epoxy resin before curing, using the melt blending method. The experiment not only combines basic knowledge with that on the scientific frontier but also links synthetic experimentation with practical application to cultivate the ability of students to find and solve problems, acquire new knowledge, and integrate theory with practice.

Key words: Synthesis, Epoxy resin, Flame retardant, Interdisciplinary experiments