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Method of preparing polyaryletherketone

A poly(aryl ether ketone), polycondensation reaction technology, used in the production of bulk chemicals, etc.

Inactive Publication Date: 2014-03-26
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the application of ionic liquids in nucleophilic substitution polycondensation reactions to prepare engineering plastics poly(aryletherketone)

Method used

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  • Method of preparing polyaryletherketone
  • Method of preparing polyaryletherketone
  • Method of preparing polyaryletherketone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Example 1 : Synthesis of bisphenol A type polyaryletherketone a) in ionic liquid of group B) to form bisphenol A potassium salt

[0115] 0.639g (0.0028mol) of bisphenol A, 0.646g (0.0028mol) of 4,4'-difluorobenzophenone and ionic liquid [1-isopropyl-3-methylimidazole Hexafluorophosphate (i-pmim PF 6 )] 2.60g was added to a 100mL four-necked round-bottomed flask equipped with a thermometer, a stirrer and a condenser connected to a Dean-Stark water separator, vacuumed and vented with nitrogen for 3 times, and heated to 100°C in 15 minutes under a nitrogen atmosphere. ℃, the system is a homogeneous solution, start mechanical stirring, and then heat up to 140 ℃ after 10 minutes, then immediately add 0.42g (0.0030mol) of potassium carbonate and 5mL of toluene at one time, and then heat to 150 ℃ after 5 minutes, potassium carbonate is rapidly dispersed In the solvent, a white suspension is formed, and after reaching 150°C, bring water at this temperature for 0.5h, the ref...

Embodiment 2

[0118] Repeat the method described in Example 1, the difference is: adopt 1-isopropyl-3-methylimidazole Bromide salt (i-pmim Br) replaces 1-isopropyl-3-methylimidazole Hexafluorophosphate (i-pmim PF 6 ). After the white solid obtained after the polymerization was purified and dried, the yield of the crude polyaryletherketone was measured to be 91.1%. The crude product had a weight-average molecular weight of 17,300 and a polydispersity coefficient of 2.26.

Embodiment 3

[0120] Repeat the method described in Example 1, the difference is: adopt 1-isopropyl-3-methylimidazole Tetrafluoroborate (i-pmim BF 4 ) to replace 1-isopropyl-3-methylimidazole Hexafluorophosphate (i-pmim PF 6 ). After the white solid obtained after the polymerization was purified and dried, the yield of the crude polyaryletherketone was measured to be 89.7%. The crude product had a weight-average molecular weight of 12,000 and a polydispersity coefficient of 1.80.

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Abstract

The invention relates to a method of preparing polyaryletherketone. The method comprises the following steps: enabling a bisphenol monomer and a salt-forming agent to react to generate a salt of bisphenol; and then, enabling the salt and 4,4'-dihalide diphenylketone to carry out polycondensation reaction to obtain the polyaryletherketone. The method is characterized in that the reaction of the formed salt of the bisphenol and the polycondensation reaction are carried out in the presence of an ionic liquid of a component (B) or composite ionic liquid containing a component (A) and the component (B), which is taken as a solvent, wherein the ionic liquid of the component (A) is selected from amphoteric ionic liquid of at least one compound with formulas I and II; and the ionic liquid of the component (B) is selected from ionic liquid of at least one compound with formulas III and IV; and each variable is defined in the specification of the application. By virtue of the method disclosed by the invention, not only can preparation conditions of polyaryletherketone be gentle, especially can reaction time (including water-carrying time) at a salt-forming stage be shortened, but also a great quantity of organic solvents do not need to be used for lowering viscosity.

Description

technical field [0001] The invention relates to a method for preparing polyaryletherketone, in particular to a method for preparing polyaryletherketone by using ionic liquid or composite ionic liquid as a solvent. Background technique [0002] Polyaryletherketone is a kind of thermoplastic special engineering plastics containing arylene group, ether bond and carbonyl group in the main chain. These groups endow this type of polymer with excellent high temperature resistance, chemical resistance and excellent mechanical properties. Since its successful development, it has been used as a strategic national defense military material. With the development of new polyaryletherketone series products, it has been gradually used in aerospace, electronic communications, civilian high-tech products, military, electronics, information, nuclear energy, and automobiles. Many fields such as manufacturing industry and precision instruments. According to the ratio of ether bonds and ketone ...

Claims

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Application Information

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IPC IPC(8): C08G8/02C08G65/40
CPCY02P20/54
Inventor 刘正平王晶
Owner BEIJING NORMAL UNIVERSITY
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