A kind of laurylhydrazide dication initiator and its preparation and use method

A dual-cation, initiator technology, applied in the direction of organic chemistry, can solve the problems of restricting chemical design, and achieve the effects of low energy consumption, fast polymerization reaction and high initiation efficiency

Active Publication Date: 2021-11-30
NINGBO UNIV
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  • 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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  • A kind of laurylhydrazide dication initiator and its preparation and use method
  • A kind of laurylhydrazide dication initiator and its preparation and use method
  • A kind of laurylhydrazide dication 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 dodecanoylhydrazide dication initiator:

[0019] 1. Mix and dissolve laurylhydrazide and glutaraldehyde in anhydrous ethanol at a molar ratio of 2:1. The mass ratio of laurylhydrazide and ethanol is controlled in the range of 1:3.5 to 1:4 and controlled under stirring. The temperature of the reaction solution is in the range of 40-50°C, and the reaction time is 1-2 hours. After the reaction is completed, cool to room temperature, and add NaBH twice the number of moles of glutaraldehyde under constant stirring. 4 Solid, after the addition, the reaction solution was allowed to stand at room temperature for 1 hour;

[0020] 2. Pour the above reaction solution into clear water, a large amount of precipitates precipitate out, collect the precipitates by filtration and recrystallize and purify in 95% ethanol, dissolve the purified solid product in absolute ethan...

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Abstract

The invention relates to a dodecylhydrazide dication initiator and a preparation method thereof. Synthesize a compound containing dication and didodecylhydrazide, which has the characteristics of a surfactant. At the same time, the hydrazide can undergo a redox reaction with potassium persulfate at room temperature, which can repeatedly generate free radicals and flexibly control the heterogeneous series. Direct polymerization, initiating the polymerization of styrene and methyl acrylate and styrene and hydroxyethyl acrylate in sequence on the water / oil interface to obtain multi-block copolymers. Experiments have proved that the ratio of monomer feed to copolymer composition It is very consistent, indicating that the initiator has a high initiation efficiency. The polymerization reaction conditions of this mode are mild and controllable, the energy consumption is low, no other organic solvents and emulsifiers are used, 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 dodecylhydrazide dication initiator and a preparation and use method thereof. The novel initiator can be used for the green synthesis of polyolefin polymer materials. Background technique [0002] Polyolefin is a very important class of general-purpose polymer materials. It is formed by free radical polymerization of several olefin monomers. For different purposes, the structure can be adjusted according to monomer copolymerization technology, so it is widely used. In the preparation of materials, initiators are indispensable. 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. The usual initiator is a class of compounds that can generate free radicals, such as oil-soluble peroxygen, azo initiat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F212/08C08F220/14C08F220/20C07D233/61
CPCC07D233/61C08F212/08C08F220/14C08F220/20C08F293/00
Inventor 吴嘉沁张瑞丰李艳肖通虎龙能兵
Owner NINGBO UNIV
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