摘要
文章采用微胶囊包覆法提高阻燃剂八溴醚的热稳定性。包覆过程为:三聚氰胺与甲醛反应制得氨基树脂预聚物的囊壳材料;将囊芯八溴醚乳化分散到水相后,氨基树脂预聚物以原位聚合的方式在八溴醚粉体表面聚合成膜。X射线光电子能谱(XPS),红外光谱(FTIR)和透射电镜(TEM)等结构表征分析证明八溴醚已被完全包覆。原位微胶囊包覆将八溴醚的初始分解温度从160℃提高到了240℃以上。
The work in this paper aims at improving tetrabromobisphenol A bis（2.3-dibromopropyl ether） （TBAB） thermal stability by the micro-capsulation method. The preparation of microencapsulated TBAB can be described as follows：firstly, oligomers of amidogen-formaldehyde are synthesized in an aqueous medium; secondly, TBAB powders are dispersed in water medium rapidly by an emulsifying machine;and then, the obtained oligomers are cross-linked in-site in the surfaces of TBAB powders. The physical and chemical properties of the micro-encapsulated TBAB are characterized by XPS, Fourier transform infrared spectroscopy （FTIR） and TEM, and they all give the positive evidence that TBAB powders have been coated completely. The results of the research showed that the appropriate reaction pH value and temperature were 4-5 and 70℃, respectively. The thermal stability of TBAB had been improved greatly, and the thermal decomposition temperature increased from 160℃ for TBAB core to 240 ℃ for micro-encapsulated TBAB.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第6期837-840,共4页
Journal of Hefei University of Technology：Natural Science
基金
广东省教育部产学研结合资助项目(2007A090302099)
关键词
微胶囊
热稳定性
八溴醚
micro-encapsulation
thermal stability
tetrabromobisphenol A bis（2. 3-dibromopropyl ether）
