The reactivity of these compounds is very high

The reactivity of these compounds is very high. The principle is: Na transfers the outermost electrons to the empty orbital of naphthalene to form anionic radicals; then forms an ion pair with Na+, releasing a large amount of resonance energy, and forming a mixed solution of dark green metal organic compounds.064nm) is greater than that of hydrogen atoms (0.

The helical conformation just surrounds the PTFE's carbon chain skeleton, which is vulnerable to chemical attack, forming a tight and complete;fluorinated; protective layer, so that the PTFE main chain is not attacked by any exteal reagents, so that PTFE has other materials Unmatched solvent resistance, chemical stability, and low cohesive energy density; at the same time, the carbon-fluorine bond is extremely strong, with a bond energy of 460.05~1u0026mu;m, the surface tension of PTFE is 18. Because the radius of fluorine atoms (0. When in contact with PTFE, sodium can break the CF bond, tear off part of the fluorine atoms on the surface of PTFE, and leave a carbonized layer on the surface ,

Polar groups such as COOH; the depth of the carbonized layer is about 0. Structural analysis of PTFE properties: In PTFE, fluorine atoms replace hydrogen atoms in polyethylene. The unbranched symmetrical main chain structure of PTFE also makes it highly crystalline, so processing is more difficult.1.2 High temperature melting method The advantage of this method is that it has better weather resistance and heat resistance than other methods, and is suitable for long-term outdoor use; the disadvantage is that PTFE will release a toxic substance during high temperature sintering, and the shape of the PTFE membrane is not easy to maintain.

Reducing agent method (sodium-naphthalene solution replacement method) The sodium-naphthalene solution replacement method is the sodium-naphthalene solution replacement method that has better effect and wider application among the various modification methods currently known.2kJ/mol, which is much higher than the carbon-hydrogen bond (410 kJ/mol) and carbon- Gas Stove Top Protectors The carbon bond (372 kJ/mol) is high, which makes PTFE have better thermal stability and chemical inertness.

In addition to sodium-naphthalenetetrahydrofuran corrosive solution, treatment solutions such as sodium-biphenyldioxane and sodium-naphthalene glycol dimethyl ether also have good effects.5u0026times;10-3N/m, and the surface has high surface energy.028nm), the carbon-carbon chain is stretched from the plane of the polyethylene and twists and tus. 2.. Surface modification method of PTFE: 2.

Ductility; at the same time, PTFE has poor creep resistance and is prone to cold flow. In addition, the electronegativity of the fluorine atoms is extremely large, and the tetrafluoroethylene monomer has perfect symmetry, which makes the attraction and surface energy between PTFE molecules low, so that PTFE has a very low surface friction coefficient and good at low temperature. The conformation gradually twists to the helical conformation of PTFE