A kind of preparation method of polyamide-imide copolymer fiber
A technology of imide copolymer fiber and polyamide, applied in the direction of drawing spinning, artificial filament heat treatment, etc., can solve the problem of fiber performance decline, etc., and achieve the effect of high modulus, simple process and high efficiency
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0025] Preparation of spinning dope: Use p-phenylenediamine (referred to as PDA), terephthaloyl chloride (referred to as TPC), 3,3',4,4'-biphenyltetracarboxylic dianhydride (referred to as BPDA) as monomers , wherein the molar ratio of terephthaloyl chloride and 3,3',4,4'-biphenyltetracarboxylic dianhydride is 1:3. Add 40.0g p-phenylenediamine into 640g N,N-dimethylacetamide solvent, stir for 2 hours under nitrogen protection, cool to 8°C, and then add 81.6g BPDA. After reacting for 3 hours, 18.8 g of terephthaloyl chloride was added to the system and reacted for 1 hour to obtain a polymer stock with a solid content of 18 wt%, ie a spinning stock solution.
[0026] Dry spinning forming: After the prepared spinning precursor solution is degassed for 12 hours under the protection of nitrogen, it is extruded into the spinning tunnel through a metering pump and a spinneret. The length of the tunnel is 12m, and the upper and middle sections of the tunnel are , and the lower end te...
Embodiment 2
[0029] Preparation of spinning dope: Use p-phenylenediamine (abbreviated as PDA), terephthaloyl chloride (abbreviated as TPC), and pyromellitic dianhydride (abbreviated as PMDA) as monomers, of which terephthaloyl chloride and pyromellitic The molar ratio of formic dianhydride is 1:2. Add 50g of p-phenylenediamine into 616g of N,N-dimethylacetamide solution, stir for 2 hours under nitrogen protection, cool to 5°C, and then add 72.8g of PMDA. After reacting for 2 hours, 31.28 g of terephthaloyl chloride was added to the system, and reacted for 2 hours to obtain a polymer stock with a concentration of 20%, that is, a spinning stock solution.
[0030] Dry spinning forming: After the prepared spinning precursor solution is left to defoam under the protection of nitrogen for 12 hours, it is extruded into the spinning tunnel through the metering pump spinneret. The length of the tunnel is 10m. The temperature at the lower end is 330 / 330 / 330°C respectively, and the spinning speed is...
Embodiment 3
[0033] Preparation of spinning dope: 2-(4-aminophenyl)-5-aminobenzimidazole (BIA for short), terephthaloyl chloride (TPC for short), 3,3',4,4'-diphenyl Ether tetracarboxylic dianhydride (s-ODPA for short) is a monomer, in which the molar ratio of terephthaloyl chloride and 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride is 2:5. Add 80g of BIA to 982g of N,N-dimethylacetamide solution, stir for 2 hours under nitrogen protection, cool to 5°C, and then add 80g of s-ODPA. After reacting for 24 hours, 20.7 g of terephthaloyl chloride was added to the system and reacted for 1.5 hours to obtain a polymer stock with a concentration of 17%, that is, a spinning stock solution.
[0034] Dry spinning: put the prepared spinning precursor solution under the protection of nitrogen for 12 hours, and then extrude it into the spinning tunnel through a metering pump and spinneret. The length of the tunnel is 10m, and the upper and middle sections of the tunnel are , the lower end temperatu...
PUM
| Property | Measurement | Unit |
|---|---|---|
| tensile strength | aaaaa | aaaaa |
| elongation at break | aaaaa | aaaaa |
| elongation at break | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More