Dianion interface initiator and preparation method thereof

Abstract

The invention relates to a dianion interface initiator and a preparation method thereof. A tertiary amine compound containing dicarboxylic acid radical anions and diphenyl groups is firstly synthesized to enable the tertiary amine compound to show the characteristics of a surfactant, tertiary amine can generate a redox reaction with potassium persulfate at room temperature, cation free radicals are firstly formed on nitrogen atoms and then converted into carbon free radicals at the adjacent positions, generation of the free radicals can be repeated for multiple times and flexibly controlled, multiphase concatenating polymerization is achieved, polymerization of styrene and butyl acrylate and polymerization of styrene and dimethyl acrylamide are initiated on a water-oil interface in sequence, and then a segmented copolymer is obtained. Experiments prove that the feed ratio of monomers is quite consistent with the component ratio of the copolymer, that is to say, the initiation efficiency of the initiator is very high, this mode of polymerization reaction is mild and controllable in condition and low in energy consumption, no other organic solvent or emulsifier is used, the product is pure, and the requirements of green chemistry are totally met.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis, in particular to a dianion interface initiator and a chemical preparation method thereof. The novel initiator can be used for the green synthesis of various polyolefin polymer materials. Background technique [0002] Polyolefin is a very important polymer material with adjustable structure, various types and wide application. These materials are generally obtained by homopolymerizing or copolymerizing olefin monomers through initiators. According to different polymerization occasions, initiators can be divided into two categories: oil-soluble and water-soluble, corresponding to the polymerization of oil-soluble and water-soluble monomers respectively. Water-soluble initiators can also initiate the polymerization of oil-soluble monomers by diffusing into emulsion microcapsules, which is surfactant-assisted emulsion polymerization. In the existing polymerization technology, the ...

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Problems solved by technology

In the existing polymerization technology, the initiator is only a compound that can generate free radicals. Their use is restricted by the properties of different monomers. People often spare no effort in the design of polymer structures, but the improvement of initiators is insufficient. , although living radical polymerization technology can make the synthesis of block copolymers simple and convenient, these living radical polymerizations can only be carried out in the organic phase generally, and cross-phase polymerization cannot be achieved. Insufficient performance, limited application value, so far cannot be widely promoted

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