Fluorine-containing polymer and preparation method thereof

Abstract

The invention belongs to the field of high molecular fluorine-containing materials, which relates to a fluorine-containing polymer and a preparation method thereof. The fluorine-containing polymer is polymerized of modified monomer units and polymerized monomer units, wherein each modified monomer is a perfluoroalkyl ether monomer containing fluorinated olefin or a perfluorinated oxygen heterocyclic monomer; and the molar ratio of the content of the modified monomer units to the content of all the monomer units is (0.01-10):100. In the preparation method, suspension polymerization or mixed phase polymerization or emulsion polymerization is adopted. The fluorine resin obtained by the preparation method is high in transparency and has excellent tensile strength, heat resistance and weather resistance. Thus, the fluorine-containing polymer is particularly suitable for architectural and agricultural greenhouse film materials as well as optical fiber and solar battery protection materials.

Description

technical field The invention belongs to the field of fluorine-containing polymer materials, and relates to a fluorine-containing polymer and a preparation method thereof. Background technique Fluoroplastic films are widely used due to their light weight, excellent weather resistance and mechanical strength. Taking ethylene-tetrafluoroethylene copolymer (ETFE) membrane as an example, the fluororesin film does not require fabric or glass fiber base layer, and has good processing performance. The modified ETFE resin can be processed by general flat membrane technology. Extruded into film, the film can be heat-sealed with a special heat-sealing machine. Due to its good tear resistance, the film can be sewn with threads that resist environmental changes. The maximum size of a single piece can reach 25m*3.5m. Glass size exceeding the largest panel (generally the largest is 8m 2 ), at the same time, ETFE resin has very good weather resistance, mechanical strength, light transmis...

AI Technical Summary

Problems solved by technology

Ethylene-tetrafluoroethylene (molar ratio 1:1) binary copolymer has a high melting point and is close to the thermal decomposition temperature. If the processing time is longer, it will cause discoloration, foaming or cracking, which is not conducive to processing and application; therefore, in order to improve Its thermal stability and mechanical properties at high temperature generally need to be modified, and a small amount of functional monomers are added according to special purposes to obtain certain characteristics

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