倍半硅氧烷
阻燃剂
环氧树脂
碱金属
盐(化学)
烧焦
高分子化学
材料科学
硅酸钠
硅酸盐
硅
复合材料
化学
化学工程
有机化学
聚合物
热解
冶金
工程类
作者
Wenyuan Zhang,Zijian Zheng,Mingyuan Zhang,Fan Yang,Wenchao Zhang,Xiaolu Wu,Rongjie Yang
出处
期刊:ACS applied polymer materials
[American Chemical Society]
日期:2023-04-25
卷期号:5 (5): 3848-3857
被引量:5
标识
DOI:10.1021/acsapm.3c00458
摘要
A series of metal polyhedral oligomeric silsesquioxane salts (POSS-M, M = Li or Na or K) were facilely synthesized using the click reaction and neutralization reaction. The chemical structure of POSS-M was confirmed by FT-IR, 1H, 13C, 29Si NMR, and XRD patterns. The well-characterized POSS-M was introduced into epoxy resins. The epoxy composites containing POSS-Na achieved the UL-94 V1 rating, and the highest LOI value also came from EP/POSS-Na, which was 27.4%. A dramatical decrease in pHRR was observed in all three composites. With 3 wt % POSS-M, the pHRR of epoxy composites dropped by up to 64.2%. Notably, compact char layers with sodium silicate on the surface were clearly observed for the first time, extending the silicon-containing flame retardant mechanism.
科研通智能强力驱动
Strongly Powered by AbleSci AI