新型胺阻燃剂对热塑性聚氨弹性体的火灾行为和透明度的影响
Mengqi Li1,2,3, Yajun Chen1,2,3, Zimeng Kong1,2,3
1School of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China.
ACS omega
|May 30, 2023
概括
一种新的阻燃剂,DCPCD,增强了热塑性聚氨 (TPU) 的阻燃性和光传导性. 这种新型复合材料达到UL 94 V-0等级,并且在保持透明度的同时显著减少热释放.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 阻燃技术 阻燃技术 阻燃技术
背景情况:
- 热塑性聚氨 (TPU) 的应用往往需要阻燃性和透明性.
- 实现高阻燃性通常会损害TPU的透明度.
- 存在对阻燃TPU材料的需求,这些材料可以保持光学清晰度.
研究的目的:
- 开发一种具有增强阻燃性和光传导性的TPU复合材料.
- 将一种新型阻燃剂DCPCD合成并纳入TPU中.
- 调查阻燃机制及其对TPU性能的影响.
主要方法:
- 通过二乙二胺和二基化合成DCPCD.
- 在不同度下将DCPCD纳入TPU.
- 使用限制氧气指数 (LOI) 和UL 94测试评估阻燃性.
- 使用圆热量计 (测量峰值热释放率 - PHRR) 分析燃烧行为.
- 对透明度和雾的评估.
- 使用SEM,拉曼光谱和XPS进行炭残留的表征.
主要成果:
- 6.0重%的DCPCD实现了27.3%的LOI,并通过了UL 94 V-0评级.
- 1 wt%的DCPCD将PHRR从1292 kW/m2降低到514 kW/m2.
- 增加的DCPCD含量降低了PHRR和总热释放,同时增加了炭残留物.
- 此外,DCPCD对TPU透明度和雾的影响最小.
- 焦炭残留分析提供了关于阻燃机制的见解.
结论:
- DCPCD是TPU的有效阻燃剂,平衡了阻燃性和透明度.
- 开发的TPU/DCPCD复合材料符合严格的阻燃标准,而不会牺牲光学性能.
- 对于要求TPU材料具有耐火性和清晰度的应用,DCPCD提供了一个有前途的解决方案.
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