Production method of polyvinylidene fluoride with thermal stability

Abstract

The invention discloses a production method of polyvinylidene fluoride with thermal stability. The production method comprises the following steps of (1)adding 1.7 parts of hydrogen peroxide and 3.1 parts of an inorganic alkaline solution into a reaction kettle, uniformly mixing, then, adding 14.3 parts of a dichlorofluoroethane solvent and 1.5 parts of a sulfonyl chloride solution, and reacting while stirring at the temperature of 2 DEG C below zero for 28 minutes; (2) introducing 5.8 parts of a sodium pyrophosphate solution, 93 parts of vinylidene fluoride monomers and 0.9 part of 1, 2-dimethylcyclopentane, reacting while stirring at the temperature of 18 DEG C, and stopping reacting when the pressure is reduced to less than 0.25MPa; and (3) filtering, washing and drying to obtain the powdery polyvinylidene fluoride. The polyvinylidene fluoride prepared by using the production method is favorable in thermal stability and processability and capable of meeting the requirements of production processes such as injection molding, extrusion and film drawing.

Description

technical field [0001] The invention relates to a production method of thermally stable 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 object of the present invention is to provide a production method of thermally stable polyvinylidene fluoride, the vinylidene fluoride prepared by the method 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 production method of thermally stable polyvinylidene fluoride, comprising the steps of: [0005] 1) Put 1.7 parts by weight of hydrogen peroxide and 3.1 parts by weight of inorg...

AI Technical Summary

Problems solved by technology

[0002] The existing vinylidene fluoride materials need to be improved in terms of thermal stability and processability, especially in the production processes such as injection molding, extrusion and film drawing.