Reactive processing of polyaryletherketones
A polyaryletherketone ketone and reactivity technology, which is applied in the field of increasing the molecular weight of polyaryletherketone, can solve the problems of harsh production conditions, high production cost, and many synthesis steps
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Embodiment 1
[0041] Prepared from diphenyl ether and a mixture of terephthaloyl chloride (T) and isophthaloyl chloride (I) in a chlorinated solvent with aluminum chloride as a catalyst at a reaction temperature of -15 to 30°C Reactive polyarylether ketone ketone polymer (50 kg) with a T / I ratio of 75:25. After isolation and purification, the resulting polymer had an intrinsic viscosity of 0.67 dL / g when measured in 0.5% concentrated sulfuric acid solution at 30°C; its UV at 455 nm when measured in 0.1% dichloroacetic acid solution The absorbance was 0.481. The UV spectrum of the polyarylether ketone ketone is as follows figure 1 shown. The polymer was dried overnight at 150°C.
[0042] Then, the dried polymer was continuously fed into a 26 mm WP twin-screw extruder (which was preset at a barrel temperature of 380° C.) at a feed rate of 10 kg / hr for melt reactive extrusion. The polymer was extruded from the WP twin-screw extruder in pelletized form. The pelletized polymer is completely...
Embodiment 2
[0044]Prepared from diphenyl ether and a mixture of terephthaloyl chloride (T) and isophthaloyl chloride (I) in a chlorinated solvent with aluminum chloride as a catalyst at a reaction temperature of -15 to 30°C Reactive polyarylether ketone ketone polymer (50 kg) with a T / I ratio of 75:25. After isolation and purification, the resulting polymer had an intrinsic viscosity of 0.78 dL / g when measured in 0.5% concentrated sulfuric acid solution at 30°C; its UV at 455 nm when measured in 0.1% dichloroacetic acid solution The absorbance was 0.338. The UV spectrum of the polyarylether ketone ketone is as follows image 3 shown. The polymer was dried overnight at 150°C.
[0045] Then, the dried polymer was continuously fed into a 26 mm WP twin-screw extruder (which was preset at a barrel temperature of 380° C.) at a feed rate of 10 kg / hr for melt reactive extrusion. The polymer was extruded from the WP twin-screw extruder in pelletized form. The pelletized polymer is completely ...
Embodiment 3
[0047] Prepared from diphenyl ether and a mixture of terephthaloyl chloride (T) and isophthaloyl chloride (I) in a chlorinated solvent with aluminum chloride as a catalyst at a reaction temperature of -15 to 30°C Reactive polyarylether ketone ketone polymer (50 kg) with a T / I ratio of 75:25. After isolation and purification, the polymer was treated with a formic acid solution (85%) at 95° C. for 30 minutes. The resulting polymer had an intrinsic viscosity of 0.81 dL / g when measured in 0.5% concentrated sulfuric acid solution at 30°C; and a UV absorbance at 455 nm of 0.233 when measured in 0.1% dichloroacetic acid solution. The polymer was dried overnight at 150°C.
[0048] The dried polymer was continuously fed at a feed rate of 10 kg / hr into a 26 mm WP twin-screw extruder (preset at a barrel temperature of 380° C.) for melt reactive extrusion. The polymer was extruded from the WP twin-screw extruder in pelletized form. The pelletized polymer was completely soluble in conce...
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