弛豫铁电聚合物兼具高的介电常数、低的介电损耗以及快速的电响应速率，是一类极具潜力的介电、储能聚合物电介质。聚(偏氟乙烯-三氟乙烯)（P(VDF-TrFE)）基二元或三元共聚物是一类常见的弛豫铁电聚合物。然而，由于该类弛豫铁电聚合物的杨氏模量低，介电强度不高，导致最大储能密度较小。本项目针对P(VDF-TrFE)的共聚物体系，采用接枝-自组装-交联的串联式改性策略，在聚合物内部构建三维刚性全有机骨架结构，提高聚合物薄膜整体的杨氏模量，实现介电强度和最大储能容量的大幅度增加，具有拓展弛豫铁电聚合物在高电场下应用潜力的意义。研究接枝链段的化学组成和物理性质等对聚合物自组装和构建三维刚性全有机骨架的影响。调查三维刚性全有机骨架结构对提升弛豫铁电聚合物介电、储能性的积极作用，辅以理论模拟揭示介电性能和介电强度协同提高的机制。为发展储能及强电场应用高性能弛豫型铁电聚合物提供理论和技术支撑。

Relaxor ferroelectric polymers have high dielectric constant, low dielectric loss, and fast electrical response rate, which are a class of promising dielectric energy storage polymers. Poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) based binary or terpolymers are a common class of relaxor ferroelectric polymers. However, due to their low Young's modulus, the dielectric strength is not high, so the maximum energy storage density is relatively low. This project is aimed at building a three-dimensional rigid all-organic framework inside the polymers matrices for increasing the Young's modulus of P(VDF-TrFE)-based binary or terpolymers through the cooperative use of graft modification, self-assembly, and cross-linking reactions in series, and finally the high dielectric strength and storage density are achieved. It is of great significance to extend the application range of relaxor ferroelectric polymers in high electric field. The effects of chemical composition and physical properties of grafted segments on polymer self-assembly and construction of a three-dimensional rigid all-organic framework are investigated. The positive effects of the three-dimensional rigid all-organic framework on enhancing the dielectric and energy storage properties of relaxed ferroelectric polymers were studied, and theoretical simulations were used to reveal the mechanism of synergistic improvement of dielectric properties and dielectric strength. Provide theoretical and technical support for the development of high-performance relaxor ferroelectric polymers for energy storage and strong electric fields.