Diphosphonate interface initiator and preparation method thereof

Abstract

The invention relates to a diphosphonate interface initiator and a preparation method thereof. A tertiary amine compound containing diphosphonic acid radical anions and didodecyl groups is firstly synthesized to enable the tertiary amine compound to show the emulsifying function which is higher than that of a common 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 methyl methacrylate and polymerization of styrene and hydroxyethyl acrylate 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 bisphosphonate interface initiator and a chemical preparation method thereof. The novel initiator can be used for the green synthesis of polyolefin polymer materials. Background technique [0002] Polyolefin is a very important general-purpose polymer material with adjustable structure and wide application. These materials are generally obtained by homopolymerizing or copolymerizing olefin monomers through free radical initiators. According to different polymerization occasions, initiators can be divided into two categories: oil-soluble and water-soluble, corresponding to oil-soluble and water-soluble monomers respectively. polymerization. Ordinary initiators are only a class of compounds that can generate free radicals, such as oil-soluble peroxides, azo initiators, and water-soluble persulfates. The use of initiators must be matched with the specific polym...

AI Technical Summary

Problems solved by technology

In recent years, living free radical polymerization technology has been greatly developed, and the way of free radical initiation has been improved, thus making the synthesis of block copolymers easier and more convenient, but these living free radical polymerizations generally only work in the organic phase However, the transition from the oil phase to the water phase cannot be achieved. The structural variability of the synthesized block polymers is not very strong, and the practical application value is limited. So far, it has not been able to be widely promoted.

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