侧链液晶环氧聚合物的导热性:介质体结构的影响
Thi En Trinh1, Kyosun Ku2, Hyeonuk Yeo1,3,4
1Department of Science Education, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea.
Macromolecular rapid communications
|December 8, 2024
概括
侧链液晶环氧聚合物 (SCLCEPs) 由于其有序的分子结构,具有增强的导热性. 在这些聚合物中缩短基链长度进一步提高了先进材料应用的热性能.
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
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 侧链液晶环氧聚合物 (SCLCEPs) 结合了液晶 (LC) 侧链与以环氧为基础的聚乙烯骨架.
- 它们的有序分子排列导致了理想的热和光学特性,包括高导热性.
- 优化导热性需要仔细考虑介质素类型,聚合物结构和分子对齐.
研究的目的:
- 为了合成新的SCLCEPs,使用聚乙烯糖醇骨干和侧面附着的半导体.
- 研究介质质结构和链长度对聚合物晶度,LC相态度和导热性的影响.
- 为了提高SCLCEPs的散热能力,用于先进的材料应用.
主要方法:
- 异环开放聚合物化不同长度的基链 mesogenic 环氧化物.
- 单体和聚合物结构的表征,包括液晶相的行为和结晶性.
- 使用已确定的技术测量导热率.
主要成果:
- 与它们的单体相比,合成的SCLCEPs表现出更高的结晶性和液晶相行为.
- 这些SCLCEP的导热率超过了0.48W·m-1·K-1.1.
- 热导率随着基链长度的减少而增加,达到0.57 W·m−1·K−1.1.
结论:
- 合成的SCLCEPs显示出需要高效散热的应用的巨大潜力.
- 聚合物的液晶性质对于其增强的导热性至关重要.
- 量身定制基链长度提供了一个可行的策略,以进一步优化SCLCEPs的热性能.
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