Low-Temperature Terpolymerizable Benzoxazine Monomer Bearing Norbornene and Furan Groups: Synthesis, Characterization, Polymerization, and Properties of Its Polymer.

There is an urgency to produce novel high-performance resins to support the rapid development of the aerospace field and the electronic industry. In the present work, we designed and consequently synthesized a benzoxazine monomer ( o HPNI-fa ) bearing both norbornene and furan groups through the flexible benzoxazine structural design capability. The molecular structure of o HPNI-fa was verified by the combination characterization of nuclear magnetic resonance spectrum, FT-IR technology, and high-resolution mass spectrum. The thermally activated terpolymerization was monitored by in situ FT-IR as well as differential scanning calorimetry (DSC). Moreover, the low-temperature-curing characteristics of o HPNI-fa have also been revealed and discussed in the current study. Furthermore, the curing kinetics of the o HPNI-fa were investigated by the Kissinger and Ozawa methods. The resulting highly cross-linked thermoset based on o HPNI-fa showed excellent thermal stability as well as flame retardancy (T d10 of 425 °C, THR of 4.9 KJg -1 ). The strategy for molecular design utilized in the current work gives a guide to the development of high-performance resins which can potentially be applied in the aerospace and electronics industries.