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Dianion interface initiator and preparation method thereof

A dianion and initiator technology, used in chemical instruments and methods, cyanide reaction preparation, organic compound preparation, etc., can solve the problem of insufficient functionality of block polymers, inability to achieve cross-phase polymerization, and insufficient initiator improvement. and other problems, to achieve the effect of fast polymerization reaction, high conversion rate, mild and controllable conditions

Active Publication Date: 2016-08-24
NINGBO UNIV
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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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  • Dianion interface initiator and preparation method thereof
  • Dianion interface initiator and preparation method thereof
  • Dianion interface initiator and preparation method thereof

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Embodiment Construction

[0019] Below in conjunction with embodiment the present invention is described in further detail.

[0020] Preparation of dianion interfacial initiator:

[0021] 1. Dissolve ethylenediamine in absolute ethanol, control the weight ratio of ethylenediamine to ethanol in the range of 1:3~1:3.5, slowly add methyl acrylate and keep stirring, the molar ratio of ethylenediamine to methyl acrylate Keep the ratio of 1:2 as much as possible, control the temperature of the system in the range of 20-25°C, and the reaction time should reach 5-6 hours;

[0022] 2. Add phenyl glycidyl ether to the above reaction mixture, the molar number of phenyl glycidyl ether should be the same as the molar number of the above methyl acrylate, gradually raise the reaction temperature to 40-50°C under stirring, and Reaction at low temperature for 4 to 5 hours;

[0023] 3. Add 30wt.% NaOH aqueous solution to the above reaction solution, the mole number of sodium hydroxide should be 1.2 to 1.5 times the mo...

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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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Application Information

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IPC IPC(8): C07C229/22C07C227/08C08F297/02
Inventor 孙怀艳张瑞丰李伟逊尚传洋江峰肖通虎龙能兵
Owner NINGBO UNIV
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