Are there any special chemical modification methods for fluororubber (solid) to improve its chemical resistance or other specific properties?
Publish Time: 2024-12-11
Fluororubber is widely used in many fields for its good chemical resistance and other properties, but in order to further improve its performance in special environments, a variety of special chemical modification methods have emerged.A common modification method is to introduce special functional groups. For example, by introducing functional groups such as amino and carboxyl groups on the fluororubber molecular chain, its reactivity with other substances can be enhanced, thereby improving its adhesion to certain substrates, which is particularly important when fluororubber is used as a coating or sealant and combined with materials such as metals. These functional groups can also change the surface energy of fluororubber to a certain extent, making it have better wettability, which is conducive to uniform adhesion on the surface of parts with complex shapes, and improving the sealing effect and protective performance.Graft copolymerization is also an effective modification method. Monomers with specific properties are grafted onto the fluororubber molecular chain, such as grafting silicon-containing monomers. The introduction of silicon can significantly improve the high and low temperature resistance of fluororubber, so that it can still maintain good flexibility at low temperatures, not easy to crack, and maintain structural stability at high temperatures, effectively broadening the use temperature range of fluororubber. At the same time, silicon-containing groups can also enhance the weather resistance of fluororubber and reduce the erosion of its performance by external factors such as ultraviolet rays and ozone.Cross-linking modification is of great significance to the performance improvement of fluororubber. The use of special cross-linking agents or cross-linking systems can optimize the cross-linking network structure of fluororubber. In this way, fluororubber can maintain its original chemical corrosion resistance while improving its mechanical strength, such as tensile strength and tear strength, so that it is not easy to be damaged when subjected to large external forces. Moreover, reasonable cross-linking modification can also improve the elastic recovery ability of fluororubber, reduce the occurrence of permanent deformation, and extend its service life.In addition, nanoparticle filling modification is gradually gaining attention. Nano-scale silica, titanium dioxide and other particles are evenly dispersed in the fluororubber matrix. These nanoparticles can play a physical barrier role, further improving the barrier ability of fluororubber to certain chemicals and enhancing chemical corrosion resistance. At the same time, nanoparticles can also enhance the hardness and wear resistance of fluororubber to a certain extent, making it adaptable to more demanding working environments.Through these special chemical modification methods, fluororubber (solid) can break through the limitations of its own performance and exert more outstanding performance in aerospace, automobile manufacturing, chemical industry and other fields, meeting the increasingly complex and stringent industrial needs and providing more reliable material guarantees for the development of related industries.
