Polyamide, and preparation method and application thereof
A polyamide, triethylenetetramine technology, applied in chemical instruments and methods, other chemical processes, adsorption water/sewage treatment, etc., can solve problems such as low cost and achieve the effect of good adsorption performance
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Embodiment 1
[0024] The molar ratio of tricarboxylic acid to triethylenetetramine shown in structural formula (II) is 1:2. Add the weighed tricarboxylic acid into the three-necked bottle, and add the measured triethylenetetramine dropwise into the three-necked bottle. In the bottle, the dropwise addition was completed in half an hour, mechanically stirred in an oil bath at 180°C, and the water separator separated unreacted small molecules and generated water, and reacted for 5 hours to obtain polyamide.
[0025] The synthesized product polyamide is characterized by infrared spectroscopy and GPC:
[0026] Such as figure 1 , figure 2 As shown, it can be seen from the infrared spectrum that there are still 2930cm in the infrared spectrum of the tricarboxylic acid and the synthesized polyamide -1 At-CH 2 characteristic absorption peaks, however figure 1 Middle 1713cm -1 is the C=O vibration peak in tricarboxylic acid, figure 2 Middle 1641cm -1 , 3286cm -1 New peaks appeared at , whic...
Embodiment 2
[0030] The molar ratio of the tricarboxylic acid shown in structural formula (II) to triethylenetetramine is 1:3, dissolve the weighed tricarboxylic acid in ethanol, add it to the three-necked bottle, and add triethylene Tetramine was added dropwise in half an hour, refluxed at 80°C for 5 hours, and rotatively evaporated to remove ethanol to obtain polyamide.
[0031] Add the synthesized polyamide, azobisisobutyronitrile, and epoxy resin in different proportions (100:6:60), (100:6:70), and (100:6:80), and stir evenly. Gradually raise the temperature from 70°C to 90°C, 110°C, 130°C to 150°C, and cure at each temperature for 12 hours. After molding, use a pulverizer to pulverize into powder, and then filter through a 60-mesh standard sieve to obtain the cured product. Polyamide powder.
Embodiment 3
[0033] The molar ratio of the tricarboxylic acid shown in structural formula (II) to triethylenetetramine is 1:2, and the weighed tricarboxylic acid is dissolved in N,N-dimethylformamide (DMF), and its Put it into a three-necked bottle, add triethylenetetramine dropwise, and drop it for half an hour, then reflux at 150°C for 5 hours, and spin to remove DMF to obtain polyamide.
[0034] Add azobisisobutyronitrile and epoxy resin to the synthesized polyamide in different proportions (100:5:60), (100:5:70) and (100:5:80) respectively, and stir evenly. Gradually raise the temperature from 70°C to 90°C, 110°C, 130°C to 150°C, and cure at each temperature for 12 hours. After molding, use a pulverizer to pulverize into powder, and then filter through a 60-mesh standard sieve to obtain the cured product. Polyamide powder.
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