Gemini type cationic surface active initiator and preparation method thereof

A technology of surface activity and initiator, applied in the field of polymer material synthesis, can solve the problems of insufficient adaptability of block polymers, inability to achieve cross-phase polymerization, and inability to popularize in large quantities, and achieve fast polymerization reaction, high conversion rate, The effect of mild and controllable reaction conditions

Active Publication Date: 2016-08-03
浙江九合环保科技有限公司
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Problems solved by technology

For example, living radical polymerization technology can make the synthesis of block copolymers easy and convenient, but these living radical polymerizations can only be carried out in the organic phase generally, and cross-phase polymerization cannot be achieved. The synthesized block polymers are suit

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  • Gemini type cationic surface active initiator and preparation method thereof
  • Gemini type cationic surface active initiator and preparation method thereof
  • Gemini type cationic surface active 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 Gemini Cationic Surface Active Initiator:

[0021] 1. Mix and dissolve octyl glycidyl ether and ethylenediamine in absolute ethanol at a molar ratio of 2:1 as much as possible, and control the weight ratio of octyl glycidyl ether to ethanol in the range of 1:2.5 to 1:3. Control the reaction temperature in the range of 25-30°C under stirring, and the reaction time in 5-6 hours;

[0022] 2. Add epichlorohydrin to the above reaction solution, the molar ratio of epichlorohydrin to octyl glycidyl ether should be controlled at 1:1 as much as possible, and the reaction temperature should be controlled in the range of 25-30°C under stirring. 4 hours;

[0023] 3. Add N-methylimidazole with the same molar number as the above-mentioned epichlorohydrin to the reaction solution, and gradually raise the reaction temperature from 50°C to 70°C under stirring, and keep it...

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Abstract

The invention relates to a gemini type cationic surface active initiator and a preparation method thereof. According to the invention, a gemini amphiphilic compound containing bis-imidazole cation and diisooctane groups is synthesized; the compound has the characteristics of better emulsification of oily monomer compared with common cationic surfactants, and a hydrophilic part, i.e., tertiary amine, of the compound may undergoe a redox reaction with potassium persulfate at room temperature; cationic radicals are formed on nitrogen atoms at first and then converted into carbon radicals at adjacent positions; production of the free radicals can be repeated a plurality of times and flexibly controlled; a serially-initiated multiphase tandem polymerization mode is realized; and polymerization of styrene and vinyl acetate and polymerization of styrene and N-vinyl pyrrolidone are sequentially initiated on a water-oil interface so as to obtain a multi-block copolymer. Experiment results show that the feed ratio of monomer is consistent with the composition ratio of the copolymer, which indicates that the initiator has high initiation efficiency; and a polymerization reaction of such a pattern has mild and controllable reaction conditions and low energy consumption, does not use other organic solvents and emulsifiers, enables a product to be pure, and completely 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 gemini-type cationic surface-active 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] Polyolefins are a very important class of polymer materials with a wide variety of applications. Such materials are generally obtained by homopolymerizing or copolymerizing olefin monomers through initiators. According to different polymerization occasions, free radical initiators can be divided into two categories: oil-soluble and water-soluble, which are used for oil-soluble and water-soluble monomers respectively. For the polymerization of monomers, water-soluble initiators can also initiate the polymerization of oil-soluble monomers by diffusing into tiny emulsion micelles. In the existing polymer polymerization technology, the free radical i...

Claims

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Application Information

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IPC IPC(8): C08F4/40C08F2/28C08F293/00C08F212/08C08F218/08C08F220/56C07D233/61
Inventor 孙怀艳李伟逊张瑞丰尚传洋江峰肖通虎龙能兵
Owner 浙江九合环保科技有限公司
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