Preparation method of PET / magnetic Fe3O4 functional nanocomposite material
A technology of functional nano-composite materials, applied in the field of preparation of PET/magnetic Fe3O4 functional nano-composite materials, which can solve the impact of shielding material mechanical strength and molding processing performance, poor compatibility between magnetic powder and polymer, easy aggregation of nano inorganic magnetic powder, etc. problems, to achieve the effect of toughening electromagnetic shielding, protecting the environment and human health, and preventing electromagnetic wave radiation pollution
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Embodiment 1
[0040] In a 2.5-liter polymerization reactor, 400 g of purified terephthalic acid, 220 g of ethylene glycol, modified Fe 3 o 4 Nanoparticles 0.19g, antimony acetate 0.12g, high-purity nitrogen replacement three times, adjust the initial pressure to 0.1MPa, heat up and stir. The esterification reaction is carried out at a pressure of 0.15-0.40Mpa and a temperature of 180-240°C. When the amount of distilled water in the esterification reaction reaches 80-100 grams, the pressure is released to end the esterification reaction, and the temperature is raised and the pressure is reduced. The polycondensation is carried out at an absolute pressure of 20-120 Pa and a temperature of 260-290° C., and the end point of the polycondensation reaction is determined according to the current change of a stirring motor to obtain PET slices.
Embodiment 2
[0042] In a 2.5-liter polymerization reactor, 400 g of purified terephthalic acid, 220 g of ethylene glycol, modified Fe 3 o 4 0.37g of nanoparticles and 0.12g of antimony acetate were replaced with high-purity nitrogen three times, and the initial pressure was adjusted to 0.1MPa, heated and stirred. The esterification reaction is carried out at a pressure of 0.15-0.40Mpa and a temperature of 180-240°C. When the amount of distilled water in the esterification reaction reaches 80-100 grams, the pressure is released to end the esterification reaction, and the temperature is raised and the pressure is reduced. The polycondensation is carried out at an absolute pressure of 20-120 Pa and a temperature of 260-290° C., and the end point of the polycondensation reaction is determined according to the current change of a stirring motor to obtain PET slices.
Embodiment 3
[0044] In a 150-liter polymerization reactor, 60Kg of purified terephthalic acid, 34Kg of ethylene glycol, modified Fe 3 o 4 13.88g of nanoparticles and 18g of antimony acetate were replaced with high-purity nitrogen three times, and the initial pressure was adjusted to 0.1MPa, heated and stirred. The esterification reaction is carried out at a pressure of 0.15-0.40Mpa and a temperature of 180-240°C. When the amount of distilled water in the esterification reaction reaches 13-16Kg, the pressure is released to end the esterification reaction, and the temperature is raised and the pressure is reduced. The polycondensation is carried out at an absolute pressure of 20-200 Pa and a temperature of 260-290° C., and the end point of the polycondensation reaction is determined according to the current change of a stirring motor to obtain PET slices.
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