Preparation method of polyvinylidene fluoride

Abstract

The invention discloses a preparation method of polyvinylidene fluoride. The preparation method comprises the following steps: (1) putting 1.3 parts of hydrogen peroxide and 2.1 parts of inorganic alkali solution by weight in a reaction kettle, uniformly mixing, then putting 8.9 parts of 1,2,2-trifluoro-1,1,2-trichloroethane solvent and 1.3 parts of undecafluoro-hexanoyl fluoride solution by weight, and stirring at 8 DEG C below zero for 35-minute reaction; (2) then introducing 5.5 parts of a polyglycol solution, 83 parts of vinylidene fluoride monomers and 3.1 parts of methylcyclopentane by weight, stirring at 32 DEG C for reaction, and ending the reaction when the pressure is reduced below 0.27 MPa; (3) filtering, washing and drying to obtain powered polyvinylidene fluoride. The prepared polyvinylidene fluoride has good heat stability and machinability, and can meet the production technology such as injection molding, extrusion and film drawing.

Description

technical field

[0001] The invention relates to a preparation method of polyvinylidene fluoride. Background technique

[0002] The thermal stability and processability of the existing vinylidene fluoride materials need to be improved, especially the production processes such as injection molding, extrusion and film drawing cannot be well satisfied. Contents of the invention

[0003] The purpose of the present invention is to provide a preparation method of polyvinylidene fluoride, the prepared vinylidene fluoride has good thermal stability and processability, and can meet the production processes of injection molding, extrusion and film drawing.

[0004] In order to achieve the above object, the technical solution of the present invention is to design a kind of preparation method of polyvinylidene fluoride, comprising the steps:

[0005] 1) Put 1.3 parts by weight of hydrogen peroxide and 2.1 parts by weight of inorganic alkali solution into the reactor, mix well, then pu...