含Si,B的动态共价键使酸乙烯树脂具有优异的阻燃性,并降低了酸乙烯树脂的火灾危险
Rui Liu1, Yifeng Zhang1, Zheng Li1
1Shaanxi Key Laboratory of Macromolecular Science and Technology, Key Laboratory of Polymer Science and Technology of Shaanxi Province, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129, China. hongxiayan@nwpu.edu.cn.
Materials horizons
|August 7, 2024
概括
一种具有动态Si-O和B-O键的新型高分支聚合物 (HPSiB) 提高了酸 (CE) 树脂的消防安全. 这种阻燃材料增强了热稳定性和介电性质,而不会影响加工能力.
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
- 消防安全工程 消防安全工程
背景情况:
- 酸乙烯 (CE) 树脂为电子包装提供了出色的介电性质.
- 然而,CE树脂存在重大火灾风险,目前的阻燃解决方案往往会损害其可加工性或固有的特性.
研究的目的:
- 开发一种使用动态共价键的CE树脂的新型阻燃策略.
- 通过形成一个紧的焦炭层来提高消防安全,而不会影响树脂的可加工性或原始性质.
主要方法:
- 一个高分支聚合物 (HPSiB) 的单合成,包含动态-氧 (Si-O) 和-氧 (B-O) 键.
- 将HPSiB纳入CE树脂以提高兼容性和降低固化温度.
- 评估阻燃性 (LOI,UL-94 V0,烟雾产生) 和材料性能 (Tg,机械,介电损耗).
主要成果:
- 该HPSiB添加剂使CE树脂的最高固化温度降低了185°C,提高了加工能力.
- 经过修改的CE树脂 (6重量%HPSiB) 实现了32.8%的LOI,UL-94 V0等级,以及6.7 m2的低总烟雾产量.
- 观察到玻璃过渡温度 (+35°C),机械性能以及在10 GHz的超低介电损耗为0.0031的显著改善.
结论:
- 在HPSiB中的动态共价键有效地促进了焦炭形成,从而导致CE树脂的优异阻燃性和减少烟雾排放.
- 这种方法提供了一种有前途的方法,用于创建具有平衡性质的高性能,耐火电子包装材料.
- 开发的HPSiB显示了需要增强消防安全和优异介电性能的先进应用的潜力.
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