摘要
Metallic organic compounds of iron, stannum and manganese were introduced into lowdensity polyethylene as catalysts of degradation at low temperatures. The mechanical properties, viscosity\|average molecular weight of polyethylene and the hydroperoxide concentration in the matrix were measured. It was shown that at 70℃ the adopted additives can catalyze the degradation of polyethylene efficiently. After 60 day’s aging, most of the samples became very fragile, and their molecular weight decreased in large scales. The relationship between molecular weght and hydroperoxide concentration, as well as the mode of the degrading behavior of the prepared matrixes, was also discussed.
Metallic organic compounds of iron, stannum and manganese were introduced into lowdensity polyethylene as catalysts of degradation at low temperatures. The mechanical properties, viscosity\|average molecular weight of polyethylene and the hydroperoxide concentration in the matrix were measured. It was shown that at 70℃ the adopted additives can catalyze the degradation of polyethylene efficiently. After 60 day's aging, most of the samples became very fragile, and their molecular weight decreased in large scales. The relationship between molecular weght and hydroperoxide concentration, as well as the mode of the degrading behavior of the prepared matrixes, was also discussed.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2000年第4期482-485,共4页
Acta Polymerica Sinica
关键词
聚乙烯
低温降解
多价态金属有机化合物
Polyethylene, Thermal degradation, Multi\|valence metallic organic compound, Hydroperoxide
