在冷热冲击下研究TPU/EP复合材料的绝缘特性
Guoqing Yang1, Nan Ding1, Chaolu Jiang1
1School of Electrical Engineering, Xi'an University of Technology, Xi'an 710054, China.
Materials (Basel, Switzerland)
|May 7, 2025
概括
热塑性聚氨弹性体 (TPU) 增强了环氧树脂 (EP) 复合材料,提高了性和电绝缘. 这些改性EP材料在热冲击条件下表现出优异的机械和介电性质.
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
- 复合材料 复合材料 复合材料
背景情况:
- 环氧树脂 (EP) 在热冲击下经常表现出降低的性和电性能.
- 提高EP在恶劣环境中的耐用性和功能对于各种应用至关重要.
研究的目的:
- 为了提高环氧树脂复合材料的机械性和电绝缘性能.
- 研究热塑性聚氨弹性体 (TPU) 结合在热循环下对EP性能的影响.
主要方法:
- 用不同的热塑性聚氨弹性体 (TPU) 填充剂含量制备改性EP复合材料.
- 在热冲击条件下评估机械性能 (弹性模量,破裂时的延长,拉力强度,冲击强度) 和电性能 (体积电阻,交流断裂强度,介电常数,介电损失) (-240小时的温度为-15°C至100°C).
主要成果:
- TPU/环氧复合材料显示显著改善:弹性模量10.1%,破裂时延长15.3%,拉伸强度22.3%,冲击强度47.8%.
- 电气性能得到了增强:体积电阻增加10.5%,交流电阻断强度提高52.1%.
- 介电常数降低了40.2%,介电损耗降低了7.5%,表明隔热性能更好.
结论:
- 将灵活的TPU分子链融入环氧树脂中,有效地提高了其性.
- 在TPU/EP复合材料中形成新的交联结构可以提高绝缘性能,特别是在热冲击条件下.
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