Ligand-free atom transfer radical polymerization method under effect of metal elementary substances

Abstract

The invention provides a ligand-free atom transfer radical polymerization method under the effect of metal elementary substances. Organic ligands are omitted in the ligand-free atom transfer radical polymerization method. Polymerization systems comprise vinyl monomers, halogenated hydrocarbon, the metal elementary substances and transition metal catalysts. The ligand-free atom transfer radical polymerization method has the advantages that atom transfer radical polymerization reaction can be carried out on the monomers under halogenated hydrocarbon activation effects of the metal elementary substances, and accordingly polymers with narrow molecular weight distribution can be generated; the halogenated hydrocarbon is activated by the aid of the metal elementary substances, accordingly, the reaction activity of the polymerization systems can be improved, polymerization after-treatment procedures can be simplified, and the cost can be reduced; the organic ligands are omitted in the ligand-free atom transfer radical polymerization method, and accordingly the shortcomings of high cost and toxicity, volatility and the like due to organic compounds or polar solvents which are used as ligands in existing atom transfer radical polymerization systems can be overcome.

Description

technical field [0001] The invention belongs to the field of macromolecule synthesis, and more specifically relates to a ligand-free atom transfer radical polymerization method under the action of a metal element, which is a new implementation method of the atom transfer radical polymerization method. Background technique [0002] The atom transfer radical polymerization method is the most important "living" / controllable polymerization method to achieve efficient design of macromolecular topology and terminal functional groups. The traditional atom transfer radical polymerization method usually uses organic ligands (such as P, N-containing compounds, organic acids, ionic liquids, etc.) Redox potential is used to improve the reactivity of the polymerization system. However, these organic compound components are expensive and highly toxic, which cannot meet the requirements of green development and wide application of polymerization methods. [0003] Elemental metals are ofte...

AI Technical Summary

Problems solved by technology

The polymerization method uses simple metals to activate halogenated hydrocarbons, which improves the reactivity of the polymerization system, simplifies the treatment process after polymerization, and reduces costs; at the same time, the method avoids the use of organic ligands, thereby solving the problem of the existing technology. The shortcomings of using organic compounds or polar solvents as ligands in transfer radical polymerization systems are expensive, toxic and volatile

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