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Gemini surface activity initiator and preparation method thereof

A surface-active and initiator technology, applied in the field of polymer material synthesis, can solve the problems of insufficient practical application value, inability to be widely promoted, and limited range of block polymer structure changes, and achieve product purity, low energy consumption, and mild reaction conditions. controllable effect

Active Publication Date: 2016-08-24
NINGBO UNIV
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Problems solved by technology

The living free radical polymerization technology developed in recent years can re-initiate the polymerization of terminal free radicals, thus making the synthesis of block copolymers easier and more convenient. However, these living free radical polymerizations can only be carried out in the organic phase and cannot be achieved Cross-phase polymerization, the range of structural changes of the synthesized block polymers is limited, the practical application value is insufficient, and it has not been widely promoted so far

Method used

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  • Gemini surface activity initiator and preparation method thereof
  • Gemini surface activity initiator and preparation method thereof
  • Gemini surface activity 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 Surface Active Initiator:

[0021] 1. Mix and dissolve octylamine and glycidol in absolute ethanol as far as possible according to the molar ratio of 1:1. The weight ratio of octylamine and ethanol is controlled in the range of 1:2.5 to 1:3, and the reaction temperature is controlled under stirring. In the range of 20-25°C, the reaction time is 3-4 hours;

[0022] 2. Add epichlorohydrin to the above reaction solution, and control the molar ratio of epichlorohydrin to octylamine at 1:2 as much as possible, and control the reaction temperature in the range of 50-60°C under stirring. After 3-4 hours of reaction, Cool to room temperature and add solid NaOH, the number of moles of NaOH should be the same as epichlorohydrin;

[0023] 3. Dissolve NaOH completely under stirring, remove tiny NaCl crystals by filtering, concentrate the filtrate with a rotary...

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Abstract

The invention relates to a gemini surface activity initiator and a preparation method thereof. An amphiphilic compound containing polyhydroxyl amine and dioctyl groups is firstly synthesized, the compound has the high characteristics of emulsifying oily monomers, hydrophilic 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, a serially-initiated multiphase concatenating polymerization mode is achieved, polymerization of styrene and vinyl acetate and polymerization of styrene and 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 gemini-type 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] Polyolefin is a very important general-purpose polymer material, and its structure is easy to adjust, so it has a wide variety and is widely used. 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 the tiny emulsion micelles. In general, initiators are only a class of compounds...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/40C07C215/18C07C213/04
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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