TPEE (thermoplastic polyester elastomer) is a block copolymer containing polyester hard segments and polyether soft segments. Among them, the polyether soft segment and the uncrystallized polyester form an amorphous phase, and the polyester hard segment partially crystallizes to form a crystalline microdomain, which acts as a physical crosslinking point.
Product Description
TPEE (thermoplastic polyester elastomer) is a block copolymer containing polyester hard segment and polyether soft segment. Among them, the polyether soft segment and the uncrystallized polyester form an amorphous phase, and the polyester hard segment partially crystallizes to form a crystalline microdomain, which acts as a physical crosslinking point.
TPEE has the elasticity of rubber and the strength of engineering plastics; the soft segment gives it elasticity, making it like rubber; the hard segment gives it processing properties, making it like plastic; compared with rubber, it has better processing properties and longer Service life; Compared with engineering plastics, it also has the characteristics of high strength, but better flexibility and dynamic mechanical properties.
TPEE has excellent oil resistance and can withstand most polar liquid chemical media (such as acids, alkalis, amine glycol compounds) at room temperature, but it is powerless to the effects of halogenated hydrocarbons (except Freon) and phenols. Its chemical resistance increases with its hardness.
TPEE has good anti-swelling performance and anti-permeability to most organic solvents, fuels and gases, and its permeability to fuel is only 1/3 to 1 of oil-resistant rubber such as neoprene, chlorosulfonated polyethylene, and nitrile rubber. /300, but TPEE has poor hot water resistance, adding polycarbimide stabilizer can significantly improve its hydrolysis resistance.
TPEE has excellent chemical stability under many different conditions, such as water mist, ozone, and outdoor atmospheric aging. Like most elastomers, it will degrade under the action of ultraviolet light, so for outdoor applications or products exposed to sunlight, UV protection additives should be added to the formulation, including carbon black and various pigments or other shielding materials ; In addition, TPEE also has different degrees of hydrolysis.
TPEE is a high-performance engineering-grade elastomer, which has the advantages of high mechanical strength, good elasticity, impact resistance, creep resistance, cold resistance, bending fatigue resistance, oil resistance, chemical and solvent corrosion resistance, etc. It has good processability and can be Filling, reinforcement and alloying modification have been widely used in the fields of auto parts, hydraulic hoses, cables and wires, electronic appliances, industrial products, cultural and sports products, biological materials and so on.