Modification filling

Outer = 0,5 mm thickness of exposed surface Inner = portion under exposed surface. 2/ Bonded = chemically bonded Filled = lumen-filled modification. 

The original basic fluorocarbon, and perhaps the most widely known one, is tetrafluo-roethylene (TFE). It has the optimum electrical and thermal properties and almost complete moisture resistance and chemical inertness. However, TFE does cold-flow or creep at moderate loading and temperatures. Filled modifications of TFE resins are available these are generally stronger than unfilled resins. Fluorinated ethylenepropylene (FEP) is similar to TFE except that its operating temperature is limited to 200°C. FEP is more easily processed,... 

Overall modification is the modification that occurs in both the interior and the surface of the polymer material. A feature of this kind of modification is that performance changes uniformly. Modification of polymer materials is mostly overall modification, such as filling modification, blending modification, crosslinking modification, morphology control modification, and so forth that were mentioned previously. 

Filling Modification and Fiber-Reinforced Composite Modification... 

Filling modification of polymer is the addition of solid additives with different composition and structure to the polymer matrix material to reduce costs or obviously change the performance of polymer products, which will improve the desired performance at the expense of other kinds of performance at the same time. Such an additive is known as a filler. Because these fillers are mostly inorganic powder, filling modification relates to performance difference and complementation of organic polymer and inorganic matter. This provides diverse areas of research and broad fields of application for filling modification. 

General Principles of Filling Modification of Polymer Materials... 

Therefore, in the practice of polymer filling modification, any extra effects of valuable performances of polymer materials must be prevented, and an integrated balance should be achieved among the contradictory effects. 

With the development of filling modification technology and a deepening understanding of fillers, reasons for using them, especially the functional fillers, have expanded from pure cost reduction to a provision of some performance characteristics to products, such as electrical property, magnetism, electric wave absorbency, ultraviolet resistance, antibiosis, and other special... 

The properties of fillers such as geometric shape, particle size and distribution, physical and chemical properties, and so on will directly affect the material performances of the filling modification system. Fillers are classified mainly into the following kinds. 

The surface modification technique of inorganic fillers directly affects the filling modification. The common surface modification methods can be classified into three types inorganic filler pretreatment, blending, and masterbatch methods. 

---