Abstract
Chlorine is an important catching reagent used in polymer chemistry, as well as various other areas of organic and inorganic chemistry. The abundance of simple methods to substantially alter polymer characteristics by adding chlorine has resulted in increasing interest in obtaining and utilizing new chlorine-containing polymers. Chlorine processes are used on a large scale not only to produce chlorine-containing polymer compounds but also in the intermediate stages of polymer synthesis. However, chlorine-containing solvents used for the production of polymers represent a dangerous and poorly controlled threat to the environment. Cheap, incombustible and volatile, these freons are close to being prohibited by law in many countries due to the degree of their negative environmental impact. A large sector of important polymer materials – silicones – is based on the so-called chloric cycle, which involves an addition of chlorine to a silicon atom at the first stage, and then removal of chlorine during the process of producing silicones. It has been shown that eliminating the need for chlorine-containing compounds in this sector is very challenging, but achievable.
Keywords
Alkoxysilanes Polyorganosiloxanes Silicones Polycondensation Direct synthesis Chlorine-free process Composite polymer materials Environmental friendly materialsNotes
Acknowledgments
This study was supported by the Russian Science Foundation (project # 14-23-00231).
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