Homogeneous polymerizations of tetrafluoroethylene (TFE) were executed in supercritical fluoroform (scCHF(3)) and the resulting poly (tetrafluoroethylene) (PTFE) was uniformly dispersed and twined fibers (ca. 100 nm in width and 10 mu m in length). The number-average molecular weight and the conversion of PTFE can be controlled by pressures of scCHF(3) from M-n = 10(4) to 10(6) and 60-80%, respectively. Heterogeneous detergent-free or stabilizer-free emulsion polymerization could be performed in the narrow condition of the scCHF(3)/water (5:3 in v/v) system at 17 MPa of the pressure with the 20-40% conversion, and the uniform spherical submicron particles (ca. 200 nm) of PTFE were obtained, in comparison with twined fibers from the homogeneous polymerization.