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Method for preparing poly(VDF-CTFE-TrFE) or poly(VDF-TrFE) by using poly(VDF-CTFE)

A technology of chlorotrifluoroethylene and vinylidene fluoride, which is applied in the hydrogenation of polymers and the preparation of polyP or polyP from polyP, which can solve the problems of environmental hazards for operators and the high toxicity of tributyltin chloride. Achieve the effect of being friendly to the human body and the environment, low cost, easy to operate and easy to control

Active Publication Date: 2012-11-07
西安德天励行新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this method, tributyltin hydride, a highly toxic reagent, is used, and its product tributyltin chloride is also highly toxic, and in order to remove trace traces of tin oxide residues in the polymer, only more toxic reagents can be used. Potassium fluoride reacts with it. These toxic reagents are very harmful to operators and the environment, so they need to be improved urgently.

Method used

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  • Method for preparing poly(VDF-CTFE-TrFE) or poly(VDF-TrFE) by using poly(VDF-CTFE)

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Embodiment 1

[0061] The method of the present embodiment comprises the following steps:

[0062] 1. In an anhydrous and oxygen-free three-necked bottle, according to the mass ratio, add 2 parts of raw material poly(vinylidene fluoride-chlorotrifluoroethylene) P(VDF-CTFE), and at the same time add 80 parts of deoxidized N- Methylpyrrolidone, after being fully dissolved, add 0.32 parts of metal halide cuprous chloride CuCl, after the cuprous chloride CuCl is dissolved, in nitrogen N 2 Under protection, add 2-2'bipyridyl which is 2 times the molar number of the metal halide and cumene which is 7 times the molar amount of cuprous chloride CuCl, and react with constant magnetic stirring at a temperature of 100°C for 12 hours;

[0063] 2. Pour the final solution obtained in step 1 into a beaker with methanol and water. The ratio of methanol to water is arbitrary. The ratio of the total volume of methanol and water in the beaker to the volume of the solution in step 1 is 2:1 , after stirring for...

Embodiment 2

[0066] The method of the present embodiment comprises the following steps:

[0067] 1. In an anhydrous and oxygen-free three-necked bottle, according to the mass ratio, add 2 parts of raw material poly(vinylidene fluoride-chlorotrifluoroethylene) P(VDF-CTFE), and at the same time add 80 parts of deoxidized N- Methylpyrrolidone, after being fully dissolved, add 0.36 parts of cuprous chloride CuCl, after the cuprous chloride CuCl is dissolved, in nitrogen N 2 Under protection, add 2-2'bipyridyl which is 2 times the molar amount of cuprous chloride CuCl and cumene which is 7 times the molar amount of cuprous chloride CuCl, and react with constant magnetic stirring at 100°C for 12 hours;

[0068] 2. Pour the final solution obtained in step 1 into a beaker with methanol and water. The ratio of methanol to water is arbitrary. The ratio of the total volume of methanol and water in the beaker to the volume of the solution in step 1 is 2:1 , after stirring for 2 hours, the polymer pre...

Embodiment 3

[0071] The method of the present embodiment comprises the following steps:

[0072] 1. In an anhydrous and oxygen-free three-necked bottle, according to the mass ratio, add 1 part of raw material poly(vinylidene fluoride-chlorotrifluoroethylene) P(VDF-C TFE), and at the same time add 50 parts of deoxidized N -Methylpyrrolidone, after fully dissolving, add 0.24 parts of cuprous bromide CuBr, after cuprous bromide CuBr dissolves, in N 2 Under protection, 2-2' bipyridine with 2 times the molar amount of CuBr and cumene with 7 times molar amount of CuBr were added, and the reaction was carried out under constant magnetic stirring at 110°C for 12 hours.

[0073] 2. Pour the final solution obtained in step 1 into a beaker with methanol and water. The ratio of methanol to water is arbitrary. The ratio of the total volume of methanol and water in the beaker to the volume of the solution in step 1 is 2:1 , after stirring for 2 hours, the polymer precipitated out. The obtained polymer...

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Abstract

The invention relates to a method for preparing poly(VDF-CTFE-TrFE) or poly(VDF-TrFE) by using poly(VDF-CTFE) which adopts N-methylpyrrolidone as solvent, uses low-valent transition metal halide and corresponding coordination compound containing N-containing ligand as initiator, adopts hydrogen-donating compound as chain transfer agent and uses poly(VDF-CTFE) as raw material to perform one-step chain transfer reaction under the protection of nitrogen and synthesize poly(VDF-CTFE-TrFE) or poly(VDF-TrFE). The method of the invention is characterized by low cost, safe operation, good stability and low toxicity, and the proportioning of the product can be precisely controlled by adjusting the reactant ratio.

Description

technical field [0001] The invention relates to the hydrogenation of polymers in the chemical industry, in particular to a method for preparing poly(vinylidene fluoride-chlorotrifluoroethylene-trifluoroethylene) from poly(vinylidene fluoride-chlorotrifluoroethylene)P(VDF-CTFE) P(VDF-CTFE-TrFE) or poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) method. Background technique [0002] Polyvinylidene fluoride PVDF and its copolymer poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) have excellent dielectric, ferroelectric, piezoelectric and other properties, since polyvinylidene fluoride Since the piezoelectric properties of ethylene PVDF were reported in the 1960s, polyvinylidene fluoride PVDF and its copolymers have been widely used in electrical insulation, microelectronic devices, sensors and other fields. In order to realize the application of such materials in energy storage capacitors, in 1998, Professor QM Zhang of Pennsylvania State University used the elec...

Claims

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Application Information

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IPC IPC(8): C08F214/22C08F214/24C08F8/04C08F4/10C08F4/26
Inventor 张志成刘二强李文静
Owner 西安德天励行新材料科技有限公司
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