FRP products are ubiquitous in our lives, do you know the important components of FRP? Yes, epoxy resin and unsaturated resin are the important components. What exactly are these two resins? What is the difference? Let me popularize them.
The concept of epoxy resin and unsaturated resin
Unsaturated resin usually refers to unsaturated polyester resin. "Polyester" is a class of polymer compounds containing ester bonds distinguished from "phenolic", "epoxy" and other resins. This polymer compound is produced by polycondensation reaction of dibasic acid and diol. When this polymer compound contains unsaturated double bond, it is called unsaturated polyester. This unsaturated polyester dissolves When it becomes a viscous liquid in a monomer with polymerization ability (generally styrene), it is called unsaturated polyester resin (English name Unsaturated Polyester Resin referred to as UPR).
All polymer compounds containing epoxy groups in the molecular structure are collectively called epoxy resins. The cured epoxy resin has good physical and chemical properties, it has excellent adhesion strength to the surface of metal and non-metal materials, good dielectric properties, small set shrinkage, good dimensional stability of products, high hardness, It has good flexibility and is stable to alkali and most solvents, so it is widely used in various sectors of national defense and national economy for casting, impregnation, laminating materials, adhesives, coatings and other purposes