苯并噁嗪是一种新型的高性能热固性树脂，将其与传统的热固性树脂共混是改善其加工性和综合性能的一种简便方法。然而，目前多数工作停留在片面的、表面的或经验性的研究阶段，缺乏原理上深入细致的研究，尤其是忽略或淡化了共混体系中的固化反应机理及其对固化物交联结构和宏观性能的影响，严重制约了苯并噁嗪的应用发展。本项目将针对上述问题，以化学反应原理和材料结构与性能理论为基础，通过化学结构表征结合分子模拟和反应动力学分析方法，系统研究苯并噁嗪/热固性树脂共混体系固化过程中组分间的竞争反应和共聚反应机理，研究单体的化学结构、固化条件、固化剂或催化剂类型等因素的影响；揭示共混树脂固化反应、固化物交联结构和固化物宏观性能之间的内在关系及基本规律；创建调控共混树脂固化物交联结构的技术方法；为高新技术领域开发两种新型高性能树脂体系。该项目的研究成果，将大大推动苯并噁嗪树脂的发展和应用，具有重要的理论意义和应用价值。

Polybenzoxazine is a new thermosetting resin with high performance. It is an easy way to improve its processing and performance by blending with traditional thermosetting resins. However, most present works just stay in the one-sided, surface, or empirical research stage. The thorough and meticulous researches are lacked. Especially, the curing reaction mechanisms of the blend systems and their effects on crosslinked structures and performance are ignored, which severely restricts the application and development of polybenzoxazine. In response to the above problems, in this project, the competitive reaction and the copolymerization reaction mechanism between components of benzoxazine/thermosetting resin blends during the curing process, and the effects of the chemical structure of monomer, curing condition, curing agent or catalyst are studied based on the chemical reaction principle and the theory of material structures and properties. The chemical structure characterization combined with molecular modeling and reaction kinetics analysis methods are used in this research. The intrinsic relationship and the basic law between the curing reactions of the blends, the crosslinked structures of polymers and the performance of polymers are proposed. The method of adjusting the crosslinked structures of the copolymers is created. In this project, two new high performance resin systems are developed for high-tech fields. The achievements of this project will greatly promote the development and application of benzoxazine resins, which has important theoretical significance and application value.