A kind of bisphosphonate interface initiator and preparation method thereof

Abstract

The invention relates to a bisphosphonate interface initiator and a preparation method thereof. Synthesize a tertiary amine compound containing bisphosphonate anion and didodecanyl to make it exhibit a stronger emulsification function than ordinary surfactants, and at the same time, the tertiary amine can undergo redox reaction with potassium persulfate at room temperature, Cationic free radicals are first formed on nitrogen atoms, and then converted into carbon free radicals at adjacent positions. The generation of free radicals can be repeated many times, flexibly controlled, and multi-phase series polymerization is realized, which is initiated sequentially on the water / oil interface. Styrene and methyl methacrylate and styrene and hydroxyethyl acrylate to obtain multi-block copolymers. Experiments have proved that the feed ratio of monomers is very consistent with the composition ratio of copolymers, indicating that the initiator has a higher initiation efficiency. The polymerization reaction conditions of this mode are mild and controllable, the energy consumption is low, no other organic solvents and emulsifiers are used, and the product is pure, which fully meets the requirements of green chemistry.

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...

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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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