Full-biodegradable polyester nano-composite and preparation process
A nano-composite material and polyester degradation technology, which is applied in the field of fully biodegradable polyester nano-composite materials and their in-situ polymerization preparation, can solve the problems of affecting the appearance, interfering with the processing process, and easily generating and accumulating static charges, etc., to achieve Good anti-static ability and excellent mechanical properties
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Embodiment 1
[0027] Weigh 6 mol of ethylene glycol and add it to the reactor, then add 0.86 g of tin oxide antimony nanoparticles, stir well to make them uniformly dispersed in ethylene glycol; add 0.4 mol of terephthalic acid and 3.6 mol of succinic acid, and add 10mmol of triphenyl phosphate was used as a stabilizer; 5mmol of tetrabutyl titanate was added as a catalyst. After the addition is completed, the stirring is started, the stirring speed is 60 rpm, and the system is evacuated to replace nitrogen. The system is heated to 160°C for atmospheric esterification reaction until the reaction no longer distills out of water, then the temperature is raised to 260°C, the pressure is reduced to 2000 Pa for pre-polycondensation reaction for 2 hours, and the pressure is continued to 80 Pa for final polycondensation reaction. When the viscosity reaches the requirement, the reaction is stopped, the kettle is taken out, and granulated to obtain a fully biodegradable polyester nanoparticle composit...
Embodiment 2
[0029] Weigh 4.8mol of butanediol into the reaction kettle, then add 5.1g of carbon black, stir well to make it evenly dispersed in butanediol; add 1.92mol terephthalic acid, 2.08mol adipic acid, and add 12mmol phosphoric acid Triphenyl ester was used as a stabilizer, and 7 mmol potassium hexafluorotitanate was used as a catalyst. After the addition is completed, the stirring is started, the stirring speed is 60 rpm, and the system is evacuated to replace nitrogen. The system is heated to 200°C for atmospheric esterification reaction until there is no more water vaporized in the reaction, then the temperature is raised to 265°C, the pressure is reduced to 2000Pa for pre-polycondensation reaction for 2.5h, and the pressure is continued to 80Pa for final polycondensation reaction , Stop the reaction when the viscosity reaches the requirement, take it out of the kettle and granulate to obtain a fully biodegradable polyester nanoparticle composite material, marked as 2#.
Embodiment 3
[0031] Weigh 4.8mol of 1,3-propanediol into the reactor, then add 8.6g of carbon fiber, stir well to make it evenly dispersed in the liquid glycol; add 1.2mol of isophthalic acid and 3.8mol of pimelic acid, and add 8mmol of triphenyl phosphate was used as a stabilizer; 10mmol of stannous octoate was used as a catalyst. After the addition is completed, the stirring is started, the stirring speed is 60 rpm, and the system is evacuated to replace nitrogen. The system is heated to 180°C for atmospheric esterification reaction until no more water is distilled out of the reaction, then the temperature is raised to 265°C, the pressure is reduced to 1500Pa for pre-polycondensation reaction for 2h, and the pressure is continued to 50Pa for final polycondensation reaction. When the viscosity reaches the requirement, the reaction is stopped, the kettle is taken out, and the pellets are made to obtain a fully biodegradable polyester nanoparticle composite material, marked as 3#.
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