摘要
通过热失重方法研究了氧化镧对低密度聚乙烯(LDPE)热氧分解行为的影响。结果表明:添加氧化镧后,LDPE在空气气氛下起始热氧分解温度可大幅提高;在LDPE失重率小于0.3时,氧化镧的加入使得LDPE热氧降解的表观活化能增大;而添加氧化镧并不影响LDPE主链的无规断链反应,因此氧化镧对LDPE的热氧稳定作用与氧有关。
The effect of lanthanum oxide （La203） on thermo-oxidative degradation behavior of LDPE was studied by means of TG analysis. The results indicate that： after adding La2O3, the initial thermooxidative degradation temperature of LDPE increases obviously under the air atmosphere; when the weight loss rate of LDPE is less than 0.3, with the addition of La203, the apparent activation energy of thermo-oxidative degradation reaction of LDPE increases; the addition of La2O3 has no effect on the main chain scission of LDPE, which means the thermal-oxidative stabilization effect of La203 on LDPE is related with oxygen.
出处
《塑料科技》
CAS
北大核心
2008年第10期86-88,共3页
Plastics Science and Technology
基金
国家自然科学基金(50273048)
关键词
氧化镧
低密度聚乙烯
热稳定性
Lanthanum oxide
Low density polyethylene
Thermal stability
