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Gemini type hydrazide anion initiator and preparation and use methods thereof

An ion-initiated, dianion technology, applied in the preparation of sulfonic acid, organic chemistry, etc., can solve problems such as limiting chemical design, and achieve the effects of low energy consumption, mild and controllable polymerization conditions, and fast polymerization.

Active Publication Date: 2019-06-11
NINGBO UNIV
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  • Claims
  • Application Information

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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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  • Gemini type hydrazide anion initiator and preparation and use methods thereof
  • Gemini type hydrazide anion initiator and preparation and use methods thereof
  • Gemini type hydrazide anion initiator and preparation and use methods thereof

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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 preparation and use methods thereof. An amphiphilic compound containing a bissulfonate radical and a hydrazide group is synthesized, and has the characteristics of a surfactant, and the hydrophilic hydrazide can undergo redox reaction with potassium persulfate at normal temperature, and free radicals can be repeatedly generated.Multi-phase tandem polymerization is flexibly controlled, and polymerization of styrene and vinyl acetate and polymerization of styrene and acrylamide are initiated in sequence at a water / oil interface to obtain a multi-block copolymer. Experiments prove that the monomer feed ratio is consistent with the composition ratio of the copolymer, and it is indicated that the initiator has high initiationefficiency. The polymerization conditions of the mode are mild and controllable, energy consumption is low, no other organic solvents and emulsifiers are adopted, the product is pure, and the requirements of green chemistry are fully met.

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 Applications(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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