Preparation process of polyvinylidene fluoride

Abstract

The invention discloses a preparation process of polyvinylidene fluoride. The preparation process comprises the following steps of (1) adding 2.1 parts of hydrogen peroxide and 1.8 parts of an inorganic alkaline solution into a reaction kettle, uniformly mixing, then, adding 11.3 parts of a dichlorodifluoromethane solvent and 0.2 part of a perfluorobutanesulforyl fluoride solution, and reacting while stirring at the temperature of 6 DEG C below zero for 30 minutes; (2) introducing 6.7 parts of a polypropylene glycol solution, 72 parts of vinylidene fluoride monomers and 2.5 parts of isopropylcyclopentane, reacting while stirring at the temperature of 35 DEG C, and stopping reacting when the pressure is reduced to be less than 0.21MPa; and (3) filtering, washing and drying to obtain the powdery polyvinylidene fluoride. The polyvinylidene fluoride prepared by using the preparation process 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 preparation process of polyvinylidene fluoride. Background technique [0002] The thermal stability and processability of the existing vinylidene fluoride materials need to be improved, and in particular, they cannot well meet the production processes such as injection molding, extrusion and film drawing. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a preparation process of polyvinylidene fluoride, and the prepared vinylidene fluoride has good thermal stability and processability, and can meet the production processes of injection molding, extrusion and film drawing. [0004] To achieve the above object, the technical scheme of the present invention is to design a preparation process of polyvinylidene fluoride, comprising the following steps: [0005] 1) Put 2.1 parts by weight of hydrogen peroxide and 1.8 parts by weight of inorganic alkali solution into the reaction kettle, mix the...

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.