摘要
合成了聚硅硼氧烷阻燃剂,并研究了聚硅硼氧烷的分子结构对其阻燃性能的影响,应用热分析(TGA)研究了PC/聚硅硼氧烷复合体系的热降解过程。具有线形结构Si-O链且有机侧基既有苯基又有甲基的聚硅硼氧烷的阻燃性能最好,在PC中添加质量分数5%的这种聚硅硼氧烷能使PC的LOI(LimitedOxygenIndex)从26%提高到41%。研究发现,在PC中添加聚硅硼氧烷可促进PC复合材料在燃烧过程中炭层的形成,然而,PC/聚硅硼氧烷LOI值的变化趋势与其热降解残渣量的变化趋势不完全一致,热降解残渣量最高的样品,其LOI值并不是最高的。
Polyborosiloxanes were synthesized and the effect of their structure on the flame retardancy was studied. The thermal degradation of the polycarbonate (PC)/polyborosiloxane blend was investigated by thermogravimetric analysis (TGA). The polyborosiloxane with linear Si-O chain and phenyl/methyl side group possesses the best flame retardancy. By adding 5 wt% of the polyborosiloxane to PC, the LOI (Limited Oxygen Index) of the PC increase from 26% to 41%. It is found that the addition of the polyborosiloxane can promote the formation of char during the PC blend combustion. Nevertheless, the change of the LOI value of the PC/polyborosiloxane blends is inconsistent with the change of the amount of their thermal degradation residues. The sample with the highest solid residue does not necessarily give the highest LOI.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2010年第S2期211-215,共5页
Rare Metal Materials and Engineering
基金
Key Science and Technique Project of Zhejiang Province (2006C21084)
关键词
聚硅硼氧烷
聚碳酸酯
热降解
阻燃性能
polyborosiloxane
polycarbonate
thermal degradation
flame retardancy
