What are the characteristics and disadvantages of unsaturated polyester resins?
Unsaturated polyester resin characteristics:A thermosetting resin that can be solidified into a insoluble polymer network polymer when it is heated or initiated.Use, in addition to the use of mixed filler as casting products, but also with the glass fiber infiltration, curing, and become a composite material, commonly known as glass fiber reinforced plastic"
Glass fiber reinforced plastics has many remarkable advantages:The quality is light, the strength is high, the price is low, and the preparation technology is various. It can be used to prepare many special-shaped parts which can not be realized by metal materialsDisadvantages: low modulus, that is, rigidity is not enough,Aging resistance compared to engineering plastic or metal differenceThere is shrinkage, and over time, the product will be deformedThe initial stage of curing is not complete, and the product has a long odor
