Polyethylene Nanocomposites with Ni, Co, and Fe Carbon‐Based Magnetic Fillers

Abstract

In the present study, the effect of Ni, Co, and Fe carbonbased magnetic fillers (Ni-C, Co-C, and Fe-C) was investigated on the magnetic, mechanical, thermal, and morphological properties of polyethylene nanocomposites. The in situ polymerization technique was used to prepare nanocomposites of polyethylene from the ethylene monomer introducing small amounts of filler ranging from 1 to 2 wt.%. The metal-carbonized fillers were obtained by pyrolysis of wood sawdust activated by Ni, Co, or Fe salts. X-ray diffraction showed that the fillers were of nanometric size. Thermogravimetric analysis was executed to investigate the thermal strength of the materials as well as to calculate the metal content in the carbon-based fillers. The onset degradation temperature showed an enhancement of 17 C, whereas the maximum degradation temperatures increased 4 C with the introduction of the filler. Differential scanning calorimetry indicated an improvement of 3 C in crystallization temperature, whereas the melting temperature remained unchanged compared to neat polyethylene. The filler was shown to increase the modulus of elasticity of the nanocomposites. The addition of 1.0 wt.% of the metal-carbonized material in the diamagnetic polymer matrix resulted in a thermoplastic nanocomposite with ferromagnetic behavior. POLYM. ENG. SCI., 60:988-995, 2020. 989 e C.A. = catalytic activity [kgPE [Zr] −1 h −1 bar −1 ]. f X c = degree of crystallinity calculated from the DSC curve.

Construction of Mechanically Reinforced Thermoplastic Polyurethane from Carbon Dioxide-Based Poly(ether carbonate) Polyols via Coordination Cross-Linking

“…On the one hand, the coordination bonds rupture at a high temperature and the ferric compound evenly distributes in TPU, which is equivalent to a physical filler that weakens the interaction, resulting in the decrease in thermal stability [ 41 ]. On the other hand, many researchers have widely revealed that the interaction of such Lewis acid as transition metals in the polymer can boost thermal degradation of the organic matrix, leading to adverse effects [ 42 , 43 , 44 ].…”

Polysulfone metal-activated carbon magnetic nanocomposites with enhanced CO2capture

“…The existence of the metal as a block spot in the polymer and a similar morphology have been reported in other studies. [40][41][42] The micrographs do not present ller aggregation.…”

Thermal and mechanical properties of in situ polymerized polyethylene/tetra‐needle likeZnOwhisker composite

“…1 It has the advantages of being cheap, light, easy to process and durable, therefore, it has become a potential substitute of traditional materials such as wood, metal and glass, for many aspects of modern human life. 2 Especially, numerous studies have been investigated to improve the mechanical, thermal, and functional properties of intrinsic polyolefin by compositing micro and nano scale fillers such as montmorillonite, [3][4][5][6] cellulose, [7][8][9][10] carbon fiber, [11][12][13][14] graphene [15][16][17] and molybdenum disulfide. 18,19 These studies have shown that micro and nano scale fillers can improve many physical and some mechanical properties of polymer, including reducing wear rate and friction significantly.…”