What types of polymers can be divided into?
By classification of the nature and use of the material, the polymer can be divided into plastic, rubber and fiber.
Hard plastic close to the fiber. The elasticity of soft plastic is from medium to high, Tm, Tg has a wide range, elastic modulus (1500O ~ 3500ON / cm?), tensile strength (150O ~ 7000N / cm?), elongation (20% ~ 800% ) Are from high to high. Polyethylene, polypropylene and crystalline nylon nylon-66 are all soft plastic. Hard plastic is characterized by large rigidity, difficult to deformation. Elastic modulus (70000 ~ 350000N / cm?) and tensile strength (3000 ~ 8500N / cm?) are very high, and the elongation at break is very low (0.5% ~ 3%). This type of plastic polymer has a rigid chain, is amorphous. Plastic according to its thermal behavior can also be divided into thermoplastic and thermosensitive plastic. According to the state of plastic can be subdivided into plastic molding, laminated plastic, foam, leather, plastic film.
According to the molecular structure of the molecular chain, the polymer can be divided into carbon chain, heterocycle and elemental organic three categories.
