为克服目前报导的本征型自修复高分子材料普遍存在强度低、不适合作为结构材料使用的缺点，本项目拟采用二苯甲酮衍生物，经紫外光照合成芳香片呐醇单体，利用空间位阻效应和电子效应调节其中心C-C共价键的键能和均裂温度，使该C-C键兼具较高键能和动态热可逆结合性，进而通过功能基团将其引入交联高分子材料。当加热到一定温度时，片呐醇中心C-C键的动态可逆断裂－结合特性得以激活，相关高分子材料即可实现裂纹的本征自修复，而在常温环境中，由于动态可逆C-C键处于休眠态，材料的分子结构保持稳定，避免了因动态键可逆交换引起的迅速应力松弛，并且C-C键赋予材料较高的强度。进一步，将探索利用动态共价键交换重组进行交联高分子材料固态循环加工的新方法，解决传统解聚回收技术的高能耗、污染环境等问题。本项目的前期研究基础扎实，预研充分，创新性突出，可行性高，对于发展新型自修复高分子材料及其应用，具有重要的理论和实际价值。

Mechanical strength of the currently reported intrinsic self-healing polymer materials is too low to be using as structural materials. In order to overcome this disadvantage, the aromatic pinacol monomers with both higher bond energy and dynamic thermal reversible properties are synthetized by radiation of benzophenone derivatives, and then introduced into macromolecular chains cross-linking by multifunctional monomers. The bond energy and homolytic temperature of central C-C bond are regulated by changing the steric effect and electronic effect. Upon heating to a certain homolysis temperature, reversible dynamic fission-recombination properties of the center C-C bond could be activated, achieving intrinsic self-healing of cracks. On the other hand, molecular structure of the materials remain stable at ambient temperature owing to the dormancy of C-C bond, which could avoid the rapid stress relaxation due to reversible exchange of dynamic bonds and also provide higher mechanical strength. Compare with intrinsic self-healing polymer based on DA bond, the dynamic reversible C-C bond could achieve healing at a single temperature without damage the structure of materials rather than at two different temperatures. Further, the project will explore a new method for solid-state recycling and processing of the crosslinking polymer materials through the exchange and recombination of dynamic covalent bonds, which could solve the defects of traditional depolymerization technology of recycling such as high energy consumption and environment pollution. Owing to the solid period research foundation, fully pre research, prominent innovation and high feasibility, the project has important theoretical and practical value for the development and application of new self-healing polymer materials.