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Synthesis method for stably improving impact strength of polyethersulfone

A technology of impact strength and synthesis method, which is applied in the field of polyethersulfone, can solve the problem of no increase in the mechanical strength of polysulfone compounds, and achieve the effects of improved impact strength performance, improved shrinkage, and good repeatability

Active Publication Date: 2022-03-08
FUHAI (DONGYING) ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What this invention uses is that a small amount of phenolic compound is blocked in the later stage of the reaction. The selected phenolic compound has only one phenolic hydroxyl group. Segment blockade termination (eg figure 2 shown), without the function of increasing the mechanical strength of polysulfone compounds

Method used

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  • Synthesis method for stably improving impact strength of polyethersulfone
  • Synthesis method for stably improving impact strength of polyethersulfone
  • Synthesis method for stably improving impact strength of polyethersulfone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Synthetic polyethersulfone by synthetic method of the present invention, method is as follows:

[0035] With condensing, N 2 118.88g (0.475mol) 4,4'-sulfonyldiphenol, 145.02g (0.505mol) 4,4'-dichlorodiphenyl Sulfone, 69.80g (0.505mol) K 2 CO 3 1. Add 272ml of N-methylpyrrolidone, gradually increase the temperature from room temperature to 190°C, add 146ml of N-methylpyrrolidone during the reaction, and extract the effluent at a rate of 70ml / h at 190°C for 3h during the reaction ( The water content in the production liquid is less than 0.3%), the temperature is maintained at 190°C for 6 hours, and then 50ml of N-methylpyrrolidone solution with a concentration of 0.5mol / L 4,4'-biphenol is added (after 2 hours, the Add 50% 4,4'-biphenol solution dropwise at a constant speed within 0.5h, add 40% 4,4'-biphenol solution dropwise at a constant speed within 1h, and add 10% 4,4'-biphenol solution), and react for 1 hour after the addition is completed. Add 500ml of N-methylp...

Embodiment 2

[0037] Synthetic polyethersulfone by synthetic method of the present invention, method is as follows:

[0038] With condensing, N 2 112.62g (0.45mol) 4,4'-sulfonyl diphenol, 150.76g (0.525mol) 4,4'-dichlorodiphenyl Sulfone, 59.35g (0.56mol) Na 2 CO 3 , Add 224ml of N,N-dimethylacetamide, gradually increase the temperature from room temperature to 160°C, add 146 ml of N,N-dimethylacetamide during the reaction, and add 70 ml / The effluent was produced at a speed of h for 3 hours (the water content in the produced solution was less than 0.3%), and the temperature was kept at 160°C for 8 hours, and then N,N-dimethyl with a concentration of 1mol / L 4,4'-biphenol was added 50ml of solution in acetamide (after adding 2h, add 50% 4,4'-biphenol solution dropwise at a constant speed within 0.5h, and add 40% 4,4'-biphenol solution dropwise at a constant speed within 1h Solution, add 10% 4,4'-diphenol solution dropwise at a constant speed within 0.5h), and react for 1h after the additi...

Embodiment 3

[0040] Synthetic polyethersulfone by synthetic method of the present invention, method is as follows:

[0041] With condensing, N 2 100.11g (0.4mol) 4,4'-sulfonyldiphenol, 172.30g (0.6mol) 4,4'-dichlorodiphenyl Sulfone, 60.00g (0.6mol) KHCO 3 1. Add 190ml of sulfolane, gradually increase the temperature from room temperature to 200°C, add 146 ml of sulfolane during the reaction, extract the effluent at 200°C at a rate of 70 ml / h for 3 hours (the water content in the produced liquid is low 0.3%), the temperature was maintained at 200°C for 5 hours, and then 50ml of a solution in sulfolane with a concentration of 2mol / L 4,4'-biphenol was added (after 2.5 hours, 50% of 4,4 '-biphenol solution, add 40% 4,4'-biphenol solution dropwise at a constant speed within 1h, and add 10% 4,4'-biphenol solution dropwise at a constant speed within 0.5h), After the addition was completed, the reaction was carried out for 1 h. Add 700ml of sulfolane to dilute the reaction polymerization solut...

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Abstract

The invention belongs to the technical field of polyethersulfone, and specifically relates to a synthesis method for stably improving the impact strength of polyethersulfone, using 4,4'-sulfonyl diphenol and 4,4'-dichlorodiphenyl sulfone as reaction monomers, Alkali metal salt is a salt-forming agent, which is polymerized in a solvent. 4,4'-biphenol is added 3‑3.5 hours before the end of the reaction. After the reaction is completed, it is precipitated, broken, and washed with water to obtain impact resistance. Reinforced polyethersulfone. The present invention optimizes the arrangement of the molecular structure and adjusts the ratio of the solid content. When the molecular weight reaches the target value in the later stage of the polymerization reaction, 4,4'-biphenol is added, and the 4,4'-biphenol quickly captures small molecules in the reaction system. Polyethersulfone fragments reduce the molecular weight distribution; within the same molar ratio range, compared with the addition of 4,4'-biphenyldiol in the early stage of the reaction, the distribution of the biphenyl structural units of the present invention is more uniform, which effectively improves the molecular weight of polyethersulfone. Impact strength.

Description

technical field [0001] The invention belongs to the technical field of polyethersulfone, in particular to a synthesis method for stably improving the impact strength of polyethersulfone. Background technique [0002] Polyethersulfone is a thermoplastic special engineering plastic successfully developed by the British Imperial Chemical Company. Its molecular structure does not contain aliphatic hydrocarbon chain segments with poor thermal properties, and is mainly composed of sulfone groups, ether groups and phenylene groups. The sulfone group imparts heat resistance; the ether group makes the polymer segment have good fluidity in the molten state and is easy to form and process; at the same time, the conjugation effect between the sulfone group and the entire structural unit provides the material with oxidation resistance and heat resistance , so the overall material exhibits excellent mechanical and thermal properties. [0003] Polyethersulfone is known as the first engine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/23
CPCC08G75/23
Inventor 史碧波王敏缪爱贞廖广明
Owner FUHAI (DONGYING) ADVANCED MATERIAL TECH CO LTD
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