摘要
用红外光谱分析法和热重法研究了丙烯腈(AN)共聚物在空气中的低温(350℃以下)热解反应,讨论了热解温度、时间、共聚单体N-乙烯基吡咯烷酮(NVP)和衣糠酸(IA)对共聚物热解反应速率的影响。结果表明,当温度升到160℃以上时,共聚物开始发生热解反应,在180℃～220℃之间,热解速率最大;在180℃时,AN与N-乙烯基吡咯烷酮(NVP)共聚物最初约有15min的诱导期。当共聚物中共聚单体NVP的质量分数小于11%时,随NVP浓度增加,热解速率加快;超过11%后,热解速率基本相等。
The degradation of acrylonitrile(AN) copolymer at low temperature(below 350 ℃) in air was studied by the infrared spectroscopy and thermogravimetry. The effect of reaction temperature, time and comonomers NVP and IA on degradation rate was discussed. It shows that the copolymer starts to degrad as the temperature above 160 ℃. During 180 ℃~220 ℃, the degradation rate is the fastest. The copolymers of AN and N-vinylpyrrolidone(NVP) have an induction period of about 15 minutes. When the comonomer NVP concentration in copolymer is less than 11%, the rate of degradation increases rapidly with the comononer concentration rising, and above a certain threshold of the comononer concentration(11%), the rate becomes almost equivalently.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2004年第4期181-183,187,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(59783002)
关键词
丙烯腈
共聚物
低温热解
反应动力学
热解速率
acrylonitrile
copolymers
degradation at low temperature
pyrolysis rate
