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

Abstract

The results of the investigations into the technological formation of new wear-resistant polymer composites based on polytetrafluoroethylene (PTFE) filled with disperse synthetic and natural compounds are presented. The efficiency of using PTFE composites reinforced with carbon fibers depends on many factors, which influence the significant improvement of physicomechanical characteristics. The results of this research allow stating that interfacial and surface phenomena of the polymer–solid interface and composition play a decisive role in PTFE composites properties. Fillers hinder the relative movement of the PTFE molecules past one another and, in this way, reduce creep or deformation of the parts, reducing the wear rate of parts used in dynamic applications as well as the coefficient of thermal expansion. The necessary structural parameters of such polymer composites are provided by regimes of process equipment.

Effect of tensile rates on thermal and mechanical properties of porous PTFE composites

“…However, the strong CF bond energy leads PTFE has no react with any other chemical groups, which can make PTFE molecular chains slip easily. This microstructure results in lower creep resistance and high thermal expansion coefficient of PTFE . Because of this characteristic, the potential advanced applications in the field of seal engineering of neat PTFE has greatly restricted …”

Properties Prediction of Linear Block-Polyurethanes Based on the Mixtures of Simple Oligoethers

“…Recently, effort focused on developing and improvements of advanced materials with properties tailored for various applications is closely connected with multifactorial analysis of its preparation, processing and characterization of properties during life-time. Berladir et al [3] and Panda et al [16] studied physical and chemical principles of the technology of formation of polymer composite materials. Anisimov [1], Dyadyura et al [6] and Bakirova & Galeeva [2] reported on the properties of thermoplastic polyurethanes based on the various mixtures of oligoethers.…”

“…In addition, block-polyurethanes based on oligoethers have increased hydrolytic resistance, frost resistance, more resistant to microorganisms, and therefore are of particular interest. Therefore, the relationship study of linear block-polyurethanes (BPU) based on mixtures of oligoethers structure with strength, deformation, rheological and tribotechnical characteristics, mathematical prediction of their behavior in different operating conditions, taking into account the quality indicators of the material, is of great practical importance for use in industry [3,4,14,16]. It was found that main characteristics that determine the properties of linear block-polyurethanes are their molecular weight and the concentration of rigid segments in a macromolecule [11,13,19,20].…”

Influence of Recycled Pa6 and PBT Plastic Material on the Bonding Strength

“…An important condition for their bonding is a satisfactory chemical composition which ensures sufficient adhesion to the adhesives [Barbosa 2018]. Although plastic bonding is basically a simple polymer bonding with polymers, this process is much more complicated in practice [Panda 2017]. For example, unlike metals, plastics contain a number of additives [Knapčíková 2018], such as colorants, plasticizers, stabilizers, etc., which in many cases prevent their perfect adhesion [Chumble 2017].…”