摘要
采用溶剂挥发法制备得到聚丙烯腈(PAN)膜,通过傅里叶变换红外光谱(FTIR)、元素分析、差示扫描量热(DSC)法研究PAN膜在120~180℃低温热氧化过程的结构和热稳定性的变化。结果表明,PAN膜在低温热氧化过程主要发生环化和氧化反应。在120℃和140℃温度下,氧化反应先于环化反应发生,环化反应程度较小;在160℃和180℃温度下,环化反应显著加剧,环化反应占主导。形成的环化和氧化结构提高了膜的热稳定性。
The polyacrylonitrile（PAN）membranes were prepared by solvent evaporation method.Structural changes of PAN membranes during 120-180℃ thermal stabilization were studied by Fourier transform infrared spectroscopy（FTIR）,elemental analysis and differential scanning calorimetry（DSC）.The results showed that cyclization and oxidization reactions of PAN membranes were significant during thermal stabilization.During the treatment of 120% and 140%,oxidization reactions were found to occur earlier than cyclization reaction,of cyclization reaction was small.During the treatment of 160% and 180℃,cyclization reaction was large extent and cyclization was dominant over oxidization reactions.Moreover,the formed structure and oxidization increased thermal stability of PAN membranes.
作者
柴晓燕
何传新
刘剑洪
Chai Xiaoyan;He Chuanxin;Liu Jianhong(College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060;Shenzhen Key Laboratory of Functional Polymer, Shenzhen University, Shenzhen 518060)
出处
《高科技纤维与应用》
CAS
2018年第1期49-54,共6页
Hi-Tech Fiber and Application
关键词
PAN膜
热氧化
化学结构
热稳定性
PAN membranes
thermal stabilization
chemical structure
thermal stability and the extent increased to a of cyclization
