2014/05/01 by S. R. Allayarov, Yu.A. Ol'khov, Yu. A. Olkhov +5
Engineering · Materials Science · #Polymer Nanocomposite Synthesis and Irradiation #Polymer Nanocomposites and Properties #Tribology and Wear Analysis
paper · doi:10.1134/s0018143914030035
openalex publication_date 2014/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Thermomechanical spectroscopy analysis was used to study the influence of accelerated protons on the molecular-topological properties of polytetrafluoroethylene (PTFE). The study showed changes in a wide number of polymer parameters as a result of bombardment with 1, 2 and 4 MeV protons at fluences up to 2 × 10 15 protons/cm 2 . The basic topological process occurring under proton bombardment is amorphicity, as found for γ-irradiation of PTFE. The flow temperature of bombarded PTFE significantly decreases with increasing the fluxes and energy of the accelerated protons. The general process resulting from proton bombardment is cleavage of C-F bonds, leading to formation of “centered” radicals ∼CF 2 CF · CF 2 ∼ and HF. The thermal stability of bombarded PTFE is below than that of virgin polymer. The rate of thermal destruction noticeably increases and the temperature of the initiation of effective thermal decomposition decreases after bombardment. The gaseous products generated during thermal destruction of the bombarded and virgin PTFE are similar.