Study on the influence of PTFE particle size on the polymer thermal behavior - I. Melting

The influence of the size of poly(tetrafluoroethylene) (PTFE) particles, obtained from the formed polymer (bar) by cutting on the fusion was studied in order to get information on the polymer breaking consequence. Three fractions of particle diameters between 1.62-0.42 mm were submitted to DSC in nitrogen, DTA in air and DRX analyses and the results compared to those obtained with the non-processed formed polymer and PTFE mentioned in literature. The study on the heating rate influence on the melting temperature range (DeltaT) and the specific heat of fusion (Q/J g(-)1) carried out with the fraction of 0.82 mm diameter afforded a method for estimating the polymer specific caloric capacity by means of DSC data.