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A kind of polyhydroxy ternary hydrazide initiator and preparation method thereof

A technology of polyhydroxy ternary hydrazide and initiator, applied in hydrazide preparation, organic chemistry, etc., can solve problems such as limiting chemical design, and achieve the effects of low energy consumption, high conversion rate, and pure product

Active Publication Date: 2022-07-15
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 polyhydroxy ternary hydrazide initiator and preparation method thereof
  • A kind of polyhydroxy ternary hydrazide initiator and preparation method thereof
  • A kind of polyhydroxy ternary hydrazide initiator and preparation method thereof

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the embodiments.

[0018] Preparation of polyhydroxy trihydrazide initiator:

[0019] 1. Mix and dissolve trimethylolpropane triglycidyl ether and benzoic hydrazide in absolute ethanol according to a mol ratio of 1:3, and the mass ratio of trimethylolpropane triglycidyl ether to ethanol is controlled at 1: In the range of 3.5 to 1:4, the reaction solution was kept refluxing for 3 to 4 hours under stirring;

[0020] 2. The above-mentioned reaction solution is transferred into the autoclave, and ethylene oxide is added. The mol ratio of ethylene oxide and benzoic hydrazide is controlled at 1.2:1, and the reaction temperature is controlled at 45~50 ℃ after the closed reaction kettle. range, the reaction time is 3 to 4 hours, and then the reactor is cooled to room temperature;

[0021] 3. Concentrate the solution in the reaction kettle with a rotary evaporator to remove ethanol, and finall...

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Abstract

The present invention relates to a polyhydroxy tribasic hydrazide initiator and a preparation and use method thereof. Synthesis of an amphiphilic compound containing three hydrazide groups, the compound has the characteristics of positioning at the water / oil two-phase interface, and the hydrazide in the hydrophilic part can undergo redox reaction with potassium persulfate at room temperature, The free radicals can be repeatedly generated for many times, so as to flexibly control the multiphase tandem polymerization mode, and sequentially initiate the polymerization of styrene and vinyl acetate and styrene and N-vinylpyrrolidone at the water / oil interface to obtain multi-block Copolymer, the experiment proves that the ratio of the monomer to the material is very consistent with the composition ratio of the copolymer, indicating that the initiator has a high initiation efficiency. The polymerization reaction conditions of this mode are mild and controllable, low energy consumption, and no other organic solvents and emulsifiers are needed. , the product is pure and 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 polyhydroxy tribasic hydrazide initiator and a preparation and use method thereof. The novel initiator can be used for green synthesis of many kinds of 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 the homopolymerization or copolymerization of olefin monomers by 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C243/38C07C241/04C08F4/40C08F293/00C08F212/08C08F218/08C08F226/10
CPCC07C241/04C08F4/40C08F293/00C08F212/08C08F218/08C08F226/10C07C243/38
Inventor 吴嘉沁张瑞丰李艳肖通虎龙能兵
Owner NINGBO UNIV
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