CATALYTIC DEGRADATION OF POLYMERS .2. DEGRADATION OF POLYETHYLENE
CATALYTIC DEGRADATION OF POLYMERS .2. DEGRADATION OF POLYETHYLENE
复制标题
DOI：
10.1016/0141-3910(89)90074-8
复制
发表时间：
1989-01-01
影响因子：
5.9
通讯作者：
BERTINI, F
中科院分区：
文献类型：
--
作者：
BELTRAME, PL;CARNITI, P;BERTINI, F
硅胶、氧化铝、硅铝石和沸石被筛选为在200-600°C范围内降解聚乙烯的催化剂。在T≥400°C下催化反应的馏分中，50%以上的产物是C9以下的馏分，具有大量的饱和和不饱和异构体，这与热降解不同，热降解得到的产物碳原子数分布更广，异构体数量较少。通过GC-MS分析得到的这些不同的分布，为降解机理提供了有用的指示。动力学测量和热重分析为筛选催化剂提供了进一步的有用数据，找到了最佳操作条件，并最终与其他聚合物降解进行了重要比较。
Silica, alumina, silica-aluminas, and zeolites were screened as catalysts for polyethylene degradation in the range 200–600°C. More than 50% of the products in the distillate from the catalytic reactions at T≥400°C, for the more efficient catalysts, were in fractions up to C9with a large amount of saturated and unsaturated isomers, at variance with the thermal degradation which gave products distributed over a wider spectrum of carbon atom numbers and with a rather small number of isomers. These different distributions, which were obtained by GC-MS analysis, gave helpful indications about the mechanism of degradation. Kinetic measurements and thermogravimetry provided further useful data for screening the catalysts, finding the best operating conditions, and eventually making significant comparisons with other polymer degradations.