Growth Mechanism of Poly (tetrafluoroethylene) Sheaf-Like Bands

Abstract

The width of sheaf-like bands observed on poly (tetrafluoroethylene) surfaces depends on cooling rate. The width is ca. 0.12μm when the polymer sheet is rapidly cooled in an atmosphere of -20-25°C. Several narrow bands appear on each of sheaf-like bands grown at low cooling rates. Their widths are ca. 0.12μm, and agree with those for rapid cooling. From this agreement it is concluded that the sheaf-like band obtained at a low cooling rate consists of the narrow bands.