对超高温电容储能器材使用的Vicinal Polydichloronorbornene的立体异构
Jing Hao1,2, Stuti Shukla3, Rishi Gurnani4
1Electrical Insulation Research Center, Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA.
Advanced materials (Deerfield Beach, Fla.)
|March 3, 2025
概括
高温介电聚合物使用分子设计进行了工程设计,揭示了立体化学.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 有机电子 有机电子
背景情况:
- 高密度电子产品需要先进的介电材料,能够承受极端温度.
- 分子工程是设计介电聚合物的关键,但立体化学的作用未得到充分探索.
研究的目的:
- 调查立体化学对新型邻近聚二甲 (PDCNB) 聚合物的特性的影响.
- 开发用于超高温应用的高性能介电材料.
主要方法:
- 在芳香吊和双循环主链上用素替代剂合成邻近的聚二甲基 (PDCNB).
- 分析了立体化学 (exo-和endo-isomers) 对材料特性的影响.
- 评估的电气性能,包括玻璃过渡温度 (Tg),带隙,传导和高温破裂强度.
主要成果:
- 在PDCNB中达到263°C的高玻璃过渡温度 (Tg).
- 外和内PDCNB异构体表现出相同的高Tg和4.3 eV的带隙.
- 证明了在250°C的特殊电容储能,其导电能力明显低于现有材料.
- 外电PDCNB显示超低导电性 (6.8 × 10−14 S m−1) 和高充放电效率 (82%).
- 终端PDCNB实现了高分解强度 (600 mV/m) 和放电能量密度 (4.47 J cm−3).
结论:
- 立体化学极大地影响了PDCNB的高场性能,尽管Tg和带隙相同.
- 基于立体化学的策略,使用邻近的二替代,有效地增强了用于超高温应用的聚甲基Tg.
- 开发了具有卓越性能的先进介电聚合物,用于要求高的航空航天和可再生能源电子.
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