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Polyhydroxy lauryl hydrazine initiator, and application method thereof

A polyhydroxyldodecanoylhydrazide and initiator technology, which is applied in the field of polymer material synthesis, can solve problems such as limiting chemical design, and achieve the effects of low energy consumption, pure products, and mild and controllable reaction conditions

Active Publication Date: 2019-07-02
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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  • Polyhydroxy lauryl hydrazine initiator, and application method thereof
  • Polyhydroxy lauryl hydrazine initiator, and application method thereof
  • Polyhydroxy lauryl hydrazine initiator, and application method thereof

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Embodiment Construction

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

[0018] Preparation of polyhydroxyl dodecanoylhydrazide initiator:

[0019] 1. Dissolve laurylhydrazide and glycidol in absolute ethanol at a molar ratio of 1:2, control the mass ratio of glycidol to ethanol in the range of 1:3 to 1:3.5, and reflux the reaction solution for 2 ~3 hours;

[0020] 2. Concentrate the above reaction solution with a rotary evaporator to remove ethanol to obtain a viscous liquid, which becomes semi-solid after cooling to room temperature. This is the polyhydroxyl dodecanoylhydrazide initiator, which can be well dispersed in water.

[0021] The use of polyhydroxy dodecanoyl hydrazide initiator is carried out according to the following steps:

[0022] a. Dissolve 1.5g of polyhydroxyl dodecanoylhydrazide initiator in 1000mL of water to prepare an aqueous solution with a mass concentration in the range of 1.0 to 1.5‰;

[0023] b. Add 55g of oil-soluble m...

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Abstract

The invention discloses a polyhydroxy lauryl hydrazine initiator, and an application method thereof. According to a preparation method method, an amphiphilic compound containing polyhydroxy and laurylhydrazine is synthesized, and is capable of realizing positioning at water / oil double-phase interface, at the same time, oxidation reduction reaction of hydrazine with potassium persulphate can be realized at normal temperature, a plurality of times of repeated generation of free radicals can be realized, so that flexible control of multi-phase series connection polymerization is realized, on thewater / oil interface, styrene and methyl acrylate, and styrene and acrylamide polymerization is induced in sequence successively on the water / oil interface, and corresponding segmented copolymers areobtained. It is confirmed by experiments that monomer feeding ratio and the composition of the copolymer are extremely consistent, it is shown that the inhibition efficiency of the inhibitor is relatively high; the polymerization conditions are mild and controllable; energy consumption is low; no other organic solvent or emulsifier is adopted; an obtained product is pure; and green chemistry requirements are satisfied.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis, in particular to a polyhydroxydodecanoylhydrazide initiator and a preparation and use method thereof. The novel initiator can be used for the green synthesis of olefin multi-block copolymers. Background technique [0002] Polyolefins are a very important class of polymer materials with a wide variety of applications. 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, which are used for 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 tiny emulsion micelles. In the existing polymer polymerization technology, the coordination between the initiator and the monomer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/40C08F293/00C08F212/08C08F220/14C08F220/56
CPCC08F4/40C08F212/08C08F220/14C08F220/56C08F293/00
Inventor 吴嘉沁张瑞丰李艳肖通虎龙能兵
Owner NINGBO UNIV
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