Method for polymerizing reverse atom transfer radicals under activation action of alkali on halohydrocarbon

Abstract

The invention provides a method for polymerizing reverse atom transfer radicals under activation action of alkali on halohydrocarbon. According to the polymerization method, no organic ligand or radical initiator is used, a polymerization system comprises vinyl monomers, halohydrocarbon, alkali and a high-valence transition metal catalyst, and monomers are subjected to a reverse atom transfer radical polymerization reaction under the activation action of alkali on halohydrocarbon to produce a polymer with narrow molecular weight distribution. With the adoption of the polymerization method, no radical initiator or a low-valence transition metal catalyst sensitive to water and oxygen is used, and meanwhile, the defects of high price and environmental pollution due to the fact that toxic and volatile organic compounds are used as ligands in existing atom transfer radical polymerization methods are overcome.

Description

technical field [0001] The invention belongs to the field of macromolecule synthesis, and in particular relates to a reverse atom transfer radical polymerization method in which alkali activates halogenated hydrocarbons, and is a new controllable radical polymerization method. Background technique [0002] Atom transfer radical polymerization (ATRP) has become the most important "living" / controllable radical polymerization method because of its advantages such as a wide variety of applicable monomers, strong molecular design, and narrow product molecular weight distribution. The traditional atom transfer radical polymerization method uses low-valence transition metal catalysts to interact with organic ligands (such as compounds containing P and N, organic acids, ionic liquids, etc.) to endow the system with higher activity. However, low-valence transition metals are easily oxidized and sensitive to moisture and air; organic ligand components are expensive and highly toxic; c...

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the object of the present invention is to provide a new method of reverse atom transfer radical polymerization in which alkali activates the action of halogenated hydrocarbons, which promotes the breaking of carbon-halogen bonds through the activation of halogenated hydrocarbons by alkalis, Without the use of free radical initiators and low-valence state transition metal catalysts sensitive to water and oxygen, the controllable polymerization of reverse atom transfer radicals of polymerized monomers is realized, and at the same time, it overcomes the toxic and easy to use of existing atom transfer radical polymerization methods. Volatile organic compounds (such as P, N-containing compounds, organic acids, ionic liquids, and raw materials containing amide groups, etc.) as ligands are expensive and environmentally polluting

Images