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Fluoric polymer and preparing method thereof

A high polymer and fluorinated technology, which is applied in the direction of final product manufacturing, electrochemical generator, sustainable manufacturing/processing, etc., can solve the problem of insufficient molecular weight of resin

Active Publication Date: 2010-07-07
SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical task of the present invention is to solve the problems of the uniform distribution of metal ions in the perfluorosulfonic acid resin material in the prior art, the oxidation aging resistance and water retention of the membrane material during use, and provide a Fluorinated high polymer and preparation method thereof
[0007] The object of the present invention is also to solve the problem that the molecular weight of the obtained resin is not high enough due to the chain transfer reaction of the short side group sulfonyl fluoride alkenyl ether monomer in the polymerization process

Method used

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  • Fluoric polymer and preparing method thereof
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  • Fluoric polymer and preparing method thereof

Examples

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specific Embodiment approach

[0042] The following examples are further illustrations of the present invention, but the present invention is not limited thereto. Unless otherwise specified, the reaction kettles used in each embodiment are all 101 stainless steel high-pressure reaction kettles, and are equipped with temperature sensors, pressure sensors, heating circulation systems, cooling circulation systems, stirring motors, internal cooling water pipes, liquid metering pumps, gas Feed valve, liquid feed valve, material discharge valve in the reactor.

[0043] The perfluoroalkyl initiator used in the synthesis process of the present invention can be prepared according to known techniques in the art, and the recommended preparation method of the present invention can be found in J.Org.Chem., 1982, 47(11):2009-2013.

[0044] Potassium persulfate, ammonium persulfate or N used in the synthesis process of the present invention 2 f 2 Initiators such as gases are all commercially available. High-purity nitr...

Embodiment 1

[0047] Embodiment 1, r=2

[0048] Reactor is cleaned and adds 4.0L deionized water, 1000ml contains 550g cerium sulfonate pendant vinyl ether monomer (1) (F 2 C=CF-O-CF 2 CF 2 -SO 3 - ) 4 Ce 4+ And 450g cerium sulfonate pendant vinyl ether monomer (2) (F 2 C=CF-O-CF 2 -CF(CF 3 )-O-CF 2 CF 2 -SO 3 - ) 3 Ce 3+ The aqueous solution, start the stirring device, vacuumize and replace with high-purity nitrogen for three times, after testing that the oxygen content in the reactor is below 1ppm, vacuumize, fill the reactor with tetrafluoroethylene monomer to a pressure of 2.2MPa, and raise the temperature to 25 ℃, add 2.15g perfluorobutyryl compound (CF 3 CF 2 CF 2 CO-OO-CCF 2 CF 2 CF 3 ) to initiate the polymerization reaction, continue to feed tetrafluoroethylene monomer to keep the reaction pressure at 2.2MPa, add 0.62g of initiator to the system every 15min, after reacting for 2h, stop adding the initiator, let the reaction continue for 15min, then stop adding ...

Embodiment 2

[0051] Embodiment 2, r=2

[0052] Reactor is cleaned and adds 4.0L deionized water, 1000ml contains 500g cerium sulfonate pendant vinyl ether monomer (1) (F 2 C=CF-O-CF 2 CF 2 -SO 3 - ) 3 Ce 3+ And 350g manganese sulfonate pendant vinyl ether monomer (2) (F 2 C=CF-O-CF 2 -CF(CF 3 )-O-CF 2 CF 2 -SO 3 - ) 2 mn 2+ The aqueous solution, start the stirring device, vacuumize and replace with high-purity nitrogen for three times, after testing that the oxygen content in the reactor is below 1ppm, vacuumize, fill the reactor with tetrafluoroethylene monomer to a pressure of 2.5MPa, and raise the temperature to 35 ℃, add 8.4g perfluoropropoxypropyl peroxide (CF 3 CF 2 CF 2 OCF (CF 3 )CO-OO-CCF(CF 3 )OCF 2 CF 2 CF 3) to initiate the polymerization reaction, continue to feed tetrafluoroethylene monomer to keep the reaction pressure at 2.5MPa, add 2.5g of initiator to the system every 25min, stop adding the initiator after reacting for 2.5h, let the reaction continue...

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Abstract

The invention provides a fluoric polymer with a sulphonate side group, which is formed by tetrafluoroethylene and two sulphonate side group iridoid monomers of different structures through polynary copolymerization. The molar fraction of the tetrafluoroethylene in the polymer is 50-90.9%, and the molar fraction of the sulphonate side group iridoid monomers is 0.1-50%. The prepared perfluoro-ion-exchange membrane assisted by the resin not only has the property of resisting various chemical mediums, but also has high conductivity, high mechanical strength, high dimensional stability, low membrane resistance and long service life, thereby being suitable for fuel batteries or chlor-alkali electrolytic cells. The invention also provides a preparing method and applications for the resin.

Description

technical field [0001] The invention belongs to the field of fluorine-containing polymer materials, and relates to a fluorinated high polymer with side groups bonded to metal ions and a preparation method thereof, in particular to a fluorinated high polymer with sulfonate side groups and a preparation method thereof . Background technique [0002] Since DuPont processed perfluorosulfonic acid resins into perfluorosulfonic acid ion exchange membranes in the 1970s and this membrane was used in the chlor-alkali industry and proton exchange membrane fuel cells, perfluorosulfonic acid ion exchange resins have been widely used in countries all over the world. has been extensively studied. [0003] Fluorine-containing ion-exchange membranes containing ion-exchange groups, especially sulfonic acid groups and carboxylic acid groups, are more suitable for use as ion-exchange membranes for fuel cells and chlor-alkali electrolyzers due to their resistance to chemical degradation. US32...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/26C08F216/14C08F2/26H01M8/02H01M2/16C25B1/46C25B13/08H01M8/1039
CPCY02E60/12Y02E60/50Y02P70/50
Inventor 张永明秦胜魏茂祥高自宏王丽宋学章
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD