一个简单而有效的氧化修饰策略,用于阻燃性环氧树脂
Linan Dun1,2, Zeen Ouyang2, Qihao Sun1
1College of Materials Science and Engineering, Northeastern University, Shenyang 110004, China.
一种新型的阻燃剂,氧化涂有2 - - 双烯) 酸 (MH@PPAC),显著提高了环氧树脂 (EP) 的消防安全性. 这种添加剂改善了分散,并实现了V-0等级,减少了烟雾和有毒气体排放.
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:
- 氧化 (MH) 是聚合物的绿色阻燃剂.
- 差散和低效率限制了MH在环氧树脂 (EP) 中的使用.
- 探索表面修改以克服EP的MH限制.
研究的目的:
- 为EP开发一种高效的基于MH的阻燃剂.
- 为了研究修改后的添加剂的阻燃性质和机制.
- 评估EP对机械性能的影响.
主要方法:
- 使用二-二基酸 (PPAC) 修改MH的表面.
- 在不同负载下制备EP/MH@PPAC复合材料.
- 使用限制氧气指数 (LOI) 和UL-94测试来评估阻燃性.
- 通过圆热量计 (释放热量,产生烟雾) 分析燃烧行为.
- 通过SEM评估机械性能和分散.
主要成果:
- MH@PPAC 获得了 EP 的 V-0 评级,负载量为 5 wt%,使 LOI 从 24.1% 增加到 38.9%.
- 观察到高峰热释放率 (53%),高峰烟雾产量率 (45%),总烟雾产量率 (51.85%) 和高峰CO生成率 (53.13%) 的显著降低.
- 在EP矩阵中证实了MH在EP矩阵中的扩散.
- 修改后的添加剂促进了密集的炭层,阻碍了燃烧.
结论:
- MH@PPAC作为EP的有效阻燃剂,提高了消防安全.
- PPAC和MH的协同作用增强了煤炭的形成,并减少了烟雾/气体排放.
- 改进的分散导致优越的机械性能,扩大了阻燃EP的应用.
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