Chemists at the University of Pennsylvania in the United States have invented new radicals that can make everyday plastics from polystyrene cups to PVC pipes, as well as to auto parts. Unlike traditional methods that have been in use for more than 50 years, this technique is carried out at room temperature and requires only a small amount of metal catalyst and reaction time.
Virgil Percec, a professor of chemistry at the University of Pennsylvania, said: "We have rewritten the basic equations for polymerization, which directly affects the cost of the reaction and the type of material produced. Polymer is a multi-billion dollar industry that can be used in multiple In the field, from pharmaceuticals to clothing, from plastics to electronics, and even complex organic synthesis."
This new technology is called single electron transfer-radical polymerization (SET-LRP), which allows chemists to better control the molecular structure of polymers and use materials that cannot be reacted by conventional methods. The whole process is very smooth, there is no need to worry about side effects, and the living creatures do not need to remove the remaining catalyst. Their results are published in the latest online publication, the Journal of the American Chemical Society.
Polymerization joins a single molecule to combine monomers into a large standard product. In this process, the chemikeeper catalyst reduces the reaction energy and produces natural chemical bonds between the individual atoms. Conventional methods require extremely high temperatures and a large amount of metal catalyst because this process requires the transfer of electron energy within the electron cloud of the atom.
Percec's new method transfers the energy of the outer electrons, which requires only a lower excitation energy and another catalytic process. Both methods use copper catalysts, but SET-LRP uses a common state of powder or wire, as well as environmentally friendly solvents such as water. This prevents the production of by-products of copper without the need to continuously add catalyst.
Bathroom Cabinets,Wood Color Bathroom Cabinet,Solid Wood Bathroom Cabinet,Bathroom Cabinet
PRO CABINET SOLUTION PTY LTD , https://www.pcscabinet.com.au