热失重角度研究低密度聚乙烯降解产物

Study on Degradation Products of Low Density Polyethylene from Thermogravimetric Angle

国内外学者对聚乙烯进行热解产物分析,但通过热重曲线来分析降解产物比较缺乏。研究了低密度聚乙烯(LDPE)在300℃~600℃热降解曲线,发现LDPE的热解汽化突变区为415℃~480℃,热裂解主要产物常温下为固态蜡状物,各裂解温度下产物均为混合物,热失重角度定性分析LDPE高温热解产物可行。

Scholars at home and abroad have analyzed the pyrolysis products of polyethylene, but the analysis of the degradation products by thermogravimetric curve is relatively lacking. The thermal degradation curves of low density polyethylene (LDPE) at 300?C - 600?C were studied and found the pyrolysis vaporization zone is 415?C - 480?C. The main products of thermal cracking are solid wax at room temperature. The products all are mixtures at each pyrolysis temperature. The qualitative analysis of LDPE pyrolysis products is feasible.