Production method of polyvinylidene fluoride

Abstract

The invention discloses a production method of polyvinylidene fluoride. The production method comprises the following steps of (1) adding 0.9 part by weight of hydrogen peroxide and 1.2 parts by weight of an inorganic alkali solution into a reaction kettle, uniformly mixing, then, adding 14.5 parts by weight of a trifluorotrichloroethane solvent and 1.8 parts by weight of a phenylmethylsulfonyl fluoride solution, and reacting at the temperature of 5 DEG C below zero for 25 minutes by stirring; (2) introducing 3.2 parts by weight of a 2-hexyl-1-decanol solution, 69 parts by weight of vinylidene fluoride monomers and 1.8 parts by weight of n-butyl cyclopentane, reacting at the temperature of 28 DEG C by stirring, and stopping reacting when the pressure is reduced to be smaller than 0.23MPa; and (3) filtering, washing and drying to obtain powdery polyvinylidene fluoride. Polyvinylidene fluoride prepared by using the production method is favorable in thermal stability and processibility and capable of meeting the requirements of production processes such as injection molding, extruding and film drawing.

Description

technical field [0001] The invention relates to a production 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 production method of polyvinylidene fluoride, the prepared vinylidene fluoride has good thermal stability and processability, and can meet production processes such as 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 polyvinylidene fluoride, comprising the steps of: [0005] 1) Put 0.9 parts by weight of hydrogen peroxide and 1.2 parts by weight of inorganic alkali solution into the reaction kettle, mix well, then p...

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.