摘要
采用热重分析-傅里叶变换红外光谱法(TGA-FTIR)研究了空气中橡塑海绵的热氧降解行为。考察了材料在3个不同升温速率下的失重情况,并对材料失重过程逸出的气体进行了分析。结果表明:橡塑海绵有两个失重阶段,随着升温速率的增大,材料的失重速率增加,最大失重速率温度有所升高;第一失重阶段是橡塑海绵中丁腈橡胶(NBR)和聚氯乙烯(PVC)官能团的热解,主要生成氯化氢及氰酸类气体;第二失重阶段是橡塑海绵中碳链的热氧降解,主要生成二氧化碳。
Thermo-oxidative degradation of rubber plastic sponge in air was studied by thermogravimetric analysis combined with Fourier transform infrared spectrometry(TGA-FTIR).The weight loss of rubber plastic sponge at 3different heating rates was investigated and the evolved gases were analyzed.The rubber plastic sponge showed two stages of weight loss.The weight loss rates and the temperature of maximum weight loss rates increased with the increasing of heating rate.The first stage corresponded to the thermo-oxidative degradation of the functional groups of NBR and PVC,and the evolved gases were cyanic acid and HCl.The second stage corresponded to thermo-oxidative degradation of the carbon chains,and the evolved gas was mainly CO2.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2014年第12期1491-1494,共4页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
国家质检总局科技计划项目(2012QK082)
