The cobalt and nickel-containing polyethylene prepared by using metal-vapor synthesis

Abstract

Abstract Cobalt and nickel-containing low-pressure polyethylene samples (HDPE) were prepared by metal-vapor synthesis (MVS) of unstable bisarene complexes of Ni and Co type (C6H5CH3)2M and their further decomposition at a temperature of 178 K in the volume of HDPE. The Faraday method shows that Ni and Co nanometer particles are stabilized by the polyethylene matrix up to T=370 K. When the Ni-HDPE material is heated above 420 K, irreversible processes of interaction of Ni clusters with the polyethylene matrix occur with the formation of a less magnetic phase. When the Co-HDPE material is heated above 420 K, Co clusters coalesce to form a more magnetic phase. At temperatures above 520 K, the magnetization of the Co/HDPE system begins to increase rapidly and approaches the value characteristic of massive cobalt. Changing the conditions of cryosynthesis significantly influences the properties of the resulting products. The sample of 2.5% Co-HDPE obtained at a temperature of 185 K is characterized by weak magnetic properties. Its magnetization at room temperature is lower than that of the samples with a similar metal content by 30-40 times. The XPS shows that nickel atoms are in the form of Ni(OH)2.