ETHYLENE/TETRAFLUOROETHYLENE COPOLYMER

摘要

To provide an ethylene/tetrafluoroethylene copolymer which is excellent in heat resistance and flexibility. An ethylene/tetrafluoroethylene copolymer comprising repeating units (A) based on tetrafluoroethylene and repeating units (B) based on ethylene in a ratio of repeating units (A)/repeating units (B) = 66/34 to 75/25 (molar ratio) and as an optional component, repeating units (C) based on a monomer represented by CH 2 =CX(CF 2 ) n Y (wherein each of X and Y which are independent of each other is a hydrogen atom or a fluorine atom, and n is from 2 to 8) in an amount of from 0 to 1 mol% based on the total number of moles of the repeating units (A) based on tetrafluoroethylene and the repeating units (B) based on ethylene, and having a volume flow rate measured at 297°C of from 4 to 1,000 mm 3 /sec and an elastic modulus of at most 500 MPa.