What are the types of polymers that are classified by performance and use?
Fibers - the direction of the molecules in the greenhouse (ie, in the direction of the molecular main chain) is very strong, the deformation after the force is smaller, in a wide temperature range (such as -50 ~ 150 ℃) mechanical properties change little High polymer, such as nylon, polyester and so on.
Rubber - in the greenhouse with high elasticity, even by a small external force deformation can be up to 10 times more, to the external force and then restore the original polymer. Such as styrene-butadiene rubber, butadiene rubber.
Plastic - at room temperature has a certain shape, the strength of the larger, after the force can occur a certain deformation of the polymer. According to the behavior of heat can be divided into two categories: where the heat can be plasticized and softened, after cooling and solidification forming, that is, with the temperature changes can be repeated denaturation called heat shrinkable plastic, such as polyethylene, polystyrene ; After heating plasticized softening and chemical changes and curing molding, cooling and then no heat plastic deformation known as thermosetting plastics, such as phenolic resin, epoxy resin.
