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Acetic acid vinyl ester-acrylic ester copolymer basis solid polymer electrolyte and film

A technology of vinyl acetate and solid polymer, which is applied in the field of polymer electrolyte materials, can solve the problems of low vinyl acetate content, no patent application, and inability to promote the mutual promotion of copolymers, and achieve low cost and high tensile strength. Tensile strength, high visible light transmittance effect

Inactive Publication Date: 2008-02-27
重庆弈派因化工产品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, random copolymers synthesized with vinyl acetate and acrylates, such as MA, EA, BA, etc. as comonomers, and blends of copolymers and second other polymers (such as PMMA, PVdF, etc.) The solid polymer electrolyte has not been reported yet, and there is no patent application
Recently, although it has been reported in the literature that the derivatives of acrylate-methyl methacrylate MMA and vinyl acetate in a 9:1 molar ratio are used as the matrix of the solid polymer electrolyte, (Lu Lei, Zuo Xiaoxi, Li Weishan, Liu Jiansheng et al., [J]. Acta Chemica Sinica, 2007, 65 (6): 475-480), but, because the vinyl acetate content in the copolymer is too low, can not play the mutual promotion effect between each component of copolymer
And the solid polymer electrolyte based on the copolymer of methyl methacrylate and vinyl acetate and the blend of the copolymer and the second polymer beyond the molar ratio has never been reported in the literature and patent application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Dissolve 1% sodium lauryl sulfate with 80g deionized water, then add it to a 250ml three-necked flask, magnetically stir and slowly raise the temperature to 70℃, constant temperature; add 0.4%(wt) dissolved in 20g deionized water %) A mixed solution of ammonium persulfate and 0.4% (wt%) sodium bicarbonate. Stir with nitrogen for 20 minutes, add 8% mass fraction of monomer VAc and MA mixture (molar ratio 1:1); after 30 minutes of reaction, the seed has basically been polymerized, and then slowly add the remaining monomer mixture dropwise. Control the dripping rate to 0.4ml / min, and the dripping is completed within 2.5h. After the addition is complete, react for 1 hour, stop the reaction and cool to room temperature. The whole reaction was carried out under nitrogen protection. After demulsification with 0.01mol / L potassium aluminum sulfate, suction filtration, washing with deionized water several times, and drying to constant weight. Then dissolve in tetrahydrofuran, filter ...

Embodiment 2

[0022] Take the P(VAc-MA) random copolymer with a monomer molar ratio of 1:1 and a certain quality of PMMA so that m(PMMA) / m(copolymer)=0.5, and dissolve it in a dry three-necked flask. In the solvent tetrahydrofuran, stir evenly at 40℃, and add the amount of LiClO in the following table 4 Or LiCF 3 SO 3 . Slowly evaporate the solvent in a dry and well-ventilated environment. After vacuum drying at 60°C, the room temperature ionic conductivity of the polymer electrolyte is 0.98~12×10 -4 S·cm -1 . The following table is different LiClO 4 The room temperature ionic conductivity data of the polymer electrolyte under the content. The conductivity unit is S·cm -1 .

[0023] Copolymer mass (g)

[0024] Conductivity×10 -4 (S / cm)

Embodiment 3

[0026] Take the P(VAc-MA) random copolymer with a monomer molar ratio of 1:1 and a certain quality of PMMA so that m(PMMA) / m(copolymer) = 1.0, and dissolve it in a dry three-necked flask. Stir evenly in the solvent tetrahydrofuran at 40℃, add the amount of LiClO in the following table 4 Or LiCF 3 SO 3 . Slowly evaporate the solvent in a dry and well-ventilated environment. After vacuum drying at 60°C, the room temperature ionic conductivity of the polymer electrolyte is 0.4~6.5×10 -4 S·cm -1 . The following table is different LiClO 4 The room temperature ionic conductivity data of the polymer electrolyte under the content. The conductivity unit is S·cm -1 .

[0027] Copolymer mass (g)

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PUM

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Abstract

The invention discloses a solid polymer electrolyte with same structure and different composite and electrolytic film, which is characterized by the following: setting the electrolytic polymer base as random copolymer of vinyl acetate VAc with feeding mole ratio at 8. 5 : 1. 5-1. 5 : 8. 5 and acrylic ester MA, MMA, EA, BA and so on; and setting as vinyl acetate-acrylic ester polymer and second polymer; setting polymer blending base as PMMA, PVdF and so on; adopting semi-continuous seed emulsion polymeric method synthesis; mixing and stirring synthetic vinyl acetate-acrylic ester random copolymer base, second polymer and Li salt under the function of the solvent evenly; getting mixed solution; casting into die; pressing; fetching film; drying; getting the product. This invention possesses better mechanical force property, hot stability and higher light transmittance ratio, which can be used to twice Li battery.

Description

Technical field [0001] The invention relates to a polymer electrolyte material, in particular to a comonomer using vinyl acetate and acrylic esters, such as methyl acrylate MA, methyl methacrylate MMA, ethyl acrylate EA, butyl acrylate BA, etc. The synthetic random copolymer and the blend of the copolymer and the second polymer, such as PMMA, PVdF, etc., are used as the solid polymer electrolyte of the polymer matrix. The solid polymer electrolyte produced by the present invention is usually used in the form of a polymer electrolyte membrane. The vinyl acetate-acrylate copolymer, the second polymer, the lithium salt and the solvent are mixed and stirred uniformly, and then cast into a film to obtain a solid polymer electrolyte membrane. The solid polymer electrolyte produced by the invention has the characteristics of high ionic conductivity, good film-forming properties, high light transmittance, and excellent mechanical properties. It is expected to be used in lithium ion second...

Claims

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Application Information

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IPC IPC(8): C08F218/08C08F220/10C08F2/24C08F2/38C08J5/18
CPCY02P20/10
Inventor 傅相锴杨道均龚永锋
Owner 重庆弈派因化工产品有限公司
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