Structure of polytetrafluoroethylene powders obtained by photochemical polymerization of gaseous monomer

Modelling of the Structure and the Required Level of Performance Properties of a Polytetrafluoroethylenecomposites for Sealing

“…The results of research in the field of PCM based on PTFE convincingly proved the effectiveness of the use of carbon fiber ( Figure 2). Established its optimal content of PTFE composites varies over a wide range (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) wt. % depending on the grade of the filler [3,6,10,11].…”

“…% depending on the grade of the filler [3,6,10,11]. The prospects of modifying the surface of carbon fibers by mechanical activation [3,5,10,12]. Consequently, carbon fiber is selected as the main fibrous filler for a series of experiments.…”

“…On the basis of experiments, it was found out that PTFE used for these studies is the most relevant for the requested requirements (Table 1). properties ( Table 2) such as high modulus of elasticity and strength, low density, high electrical conductivity, low coefficient of friction and thermal expansion, high resistance to atmospheric influences and chemical reagents [12]. Table 2 Main characteristics of carbon-fibers [13,14] Parameter Value Carbon content, % 80,0 -99,5…”

“…One of the basic calculations for designing seals is the static strength calculation. To determine the stress-strain state of the elements, apply the momentary scheme of the finite element [12].…”

Manufacturing Technology of Composite Materials—Principles of Modification of Polymer Composite Materials Technology Based on Polytetrafluoroethylene

“…The review of literature and patents [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ] reveals a low potential of traditional technological approaches in obtaining PTFE-based PCM. However, various advanced technological methods that allow obtaining composite materials and products with the required performance properties may be implemented.…”