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A kind of polyhydroxy lauryl hydrazide initiator and using method thereof

A polyhydroxyl dodecanoylhydrazide 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, high conversion rate, and pure products

Active Publication Date: 2021-11-16
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • 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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  • A kind of polyhydroxy lauryl hydrazide initiator and using method thereof
  • A kind of polyhydroxy lauryl hydrazide initiator and using method thereof
  • A kind of polyhydroxy lauryl hydrazide initiator and using 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 relates to a method for preparing and using a polyhydroxydodecanoylhydrazide initiator. Synthesize an amphiphilic compound containing polyhydroxyl and dodecylhydrazide, which has the characteristics of positioning at the water / oil two-phase interface, and at the same time, the hydrazide can undergo redox reactions with potassium persulfate at room temperature, which can be repeated many times Generate free radicals, so as to flexibly control multi-phase serial polymerization, initiate the polymerization of styrene and methyl acrylate and styrene and acrylamide in sequence on the water / oil interface, and obtain the corresponding multi-block copolymers. The feed ratio of the copolymer 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, and the energy consumption is low. No other organic solvents and emulsifiers are used. The product is pure and fully conforms to requirements of green chemistry.

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 Patents(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