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A kind of gemini type hydrazide anion initiator and its preparation and use method

A technology of ion initiation and hydrazide anion, which is applied in the preparation of sulfonic acid and organic chemistry, can solve the problems of limited chemical design, and achieve the effects of low energy consumption, high conversion rate and pure product

Active Publication Date: 2022-03-18
NINGBO UNIV
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Problems solved by technology

The difference is that the active species of free radical living polymerization is generally only produced in a specific place, which limits the chemical design

Method used

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  • A kind of gemini type hydrazide anion initiator and its preparation and use method
  • A kind of gemini type hydrazide anion initiator and its preparation and use method
  • A kind of gemini type hydrazide anion initiator and its preparation and use method

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Embodiment Construction

[0017] Below in conjunction with embodiment the present invention is described in further detail.

[0018] Preparation of Gemini Hydrazide Anionic Initiator:

[0019] 1. Mix and dissolve n-octylhydrazide and epichlorohydrin in absolute ethanol according to the molar ratio of 2:1. The weight ratio of n-octylhydrazide and ethanol is controlled in the range of 1:3.5~1:4. Reflux reaction for 4-5 hours, then add NaOH solid with an equimolar number of epichlorohydrin, and then stir at room temperature for 1-1.5 hours;

[0020] 2. Add propane sultone to the above reaction solution, the molar ratio of propane sultone to n-octylhydrazide is controlled at 1:1, and the reaction temperature is controlled at 30-40°C under stirring. Reactions 1-2 After 1 hour, add solid NaOH with the same molar number as propane sultone, and stir at room temperature for 2 to 3 hours until NaOH is completely dissolved;

[0021] 3. Filter the above reaction solution to remove the NaCl particles generated by...

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Abstract

The invention relates to a gemini type hydrazide anion initiator and its preparation and use method. Synthesize an amphiphilic compound containing a disulfonate group and a hydrazide group, which has the characteristics of a surfactant. At the same time, the hydrophilic hydrazide can undergo redox reactions with potassium persulfate at room temperature, and can repeatedly generate free radicals , flexibly control the multi-phase serial polymerization, initiate the polymerization of styrene and vinyl acetate and styrene and acrylamide in sequence on the water / oil interface, and obtain multi-block copolymers. The composition ratio of the compounds is very consistent, indicating that the initiator has a high initiation efficiency. The polymerization reaction conditions of this mode are mild and controllable, low energy consumption, no other organic solvents and emulsifiers, 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 gemini type hydrazide anion initiator and a preparation and use 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 diffuse into the tiny emulsion micelles to initiate the polymerization of oil-soluble monomers. In general, initiators are only a class of compounds...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/00C08F293/00C07C303/22C07C309/14
Inventor 吴嘉沁张瑞丰李艳肖通虎龙能兵
Owner NINGBO UNIV
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