BLEND POLYMER CONTAINING ETHYLENE/TETRAFLUOROETHYLENE COPOLYMER, MOLDED BODY OF SAID BLEND POLYMER, BACK SHEET FOR SOLAR CELLS, AND METHOD FOR PRODUCING SAID MOLDED BODY

摘要

Provided are: a blend polymer which contains an ethylene/tetrafluoroethylene copolymer and has excellent weather resistance and high heat distortion temperature; a molded body such as a film of the blend polymer; a back sheet for solar cells, which is provided with the film or the like; and a method for producing the molded body. A blend polymer which contains an ethylene/tetrafluoroethylene copolymer and a polymethyl methacrylate, and wherein the mass ratio of the ethylene/tetrafluoroethylene copolymer relative to the total mass of the ethylene/tetrafluoroethylene copolymer and the polymethyl methacrylate in the blend polymer is 50-75%. This blend polymer has a microphase-separated structure wherein the continuous phase is composed of the ethylene/tetrafluoroethylene copolymer and the dispersed phase is composed of the polymethyl methacrylate.