Long carbon-chain semi-aromatic polyamide and synthetic method of same
A semi-aromatic and polyamide technology, applied in the field of materials, can solve the problems that have not been reported, and achieve the effect of simple preparation process and controllable polymerization process
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Embodiment 1
[0039] Add hexamethylenediamine, 11-aminoundecanoic acid, and terephthalic acid in the weight of 23.2kg, 40.2kg, and 33.2kg (molar ratio: 1:1:1) into the stirring polymerization reactor after vacuum drying, After evacuating for 10 minutes, pass nitrogen gas for 2 minutes, and cycle like this 6 times, so that the reactant exists in an environment under the protection of nitrogen gas, and control the system pressure in the reactor to 0.2 MPa. Seal the reactor and heat it up to 130°C, and adjust the stirring speed of the polymerization reactor to 200r / min, control the system pressure in the reactor to 1.1MPa, keep the reactant under pressure for 1 hour, and slowly release the gas to normal pressure, Reheat to 300° C., and adjust the stirring speed of the polymerization reactor to 50 r / min. After constant temperature, continue vacuuming for 8 hours, and the reaction ends. Nitrogen-filled material is discharged, cooled in a water tank, and pelletized to prepare PA11T.
[0040] The...
Embodiment 2
[0043]Add hexamethylenediamine, 11-aminoundecanoic acid, and terephthalic acid in the weight of 23.2kg, 80.4kg, and 33.2kg (molar ratio: 1:2:1) into the stirring polymerization reactor after vacuum drying, After evacuating for 10 minutes, pass nitrogen gas for 2 minutes, and circulate like this 6 times, so that the reactant exists in the environment under the protection of nitrogen gas, and the system pressure in the reactor is controlled to be 0.2 MPa. Seal the reactor and heat it to 130°C, and adjust the stirring speed of the polymerization reactor to 200r / min, control the system pressure in the reactor to 1.1MPa, keep the reactants warm and pressurized for 1 hour, and slowly release the gas to normal pressure, Reheat to 300° C., and adjust the stirring speed of the polymerization reactor to 50 r / min. After constant temperature, continue vacuuming for 8 hours, and the reaction ends. Nitrogen-filled material is discharged, cooled in a water tank, and pelletized to prepare PA1...
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