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Cationic surface active initiator and preparation method thereof

A technology of surface activity and initiator, applied in the field of polymer material synthesis, can solve problems such as insufficient improvement of initiators, and achieve the effects of mild and controllable polymerization conditions, high conversion rate and low energy consumption

Active Publication Date: 2016-08-03
宁波猎知乐科技咨询有限公司
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Problems solved by technology

In the development of polymer materials, people often spare no effort in the design of polymer structures, but the improvement of initiators is insufficient. In fact, the improvement of initiators can bring great benefits to the development of polyolefin polymer materials. space

Method used

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  • Cationic surface active initiator and preparation method thereof
  • Cationic surface active initiator and preparation method thereof
  • Cationic surface active initiator and preparation method thereof

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the embodiments.

[0020] Preparation of cationic surfactant initiators:

[0021] 1. Mix and dissolve dodecylamine and epichlorohydrin in absolute ethanol at a molar ratio of 2:1 as much as possible. The weight ratio of dodecylamine and ethanol is controlled in the range of 1:4.5 to 1:5. Under stirring Control the reaction temperature to be in the range of 50 to 60 °C, and the reaction time to be in the range of 3 to 4 hours. After the reaction is completed, it is cooled to room temperature, and solid NaOH having the same mole number as the above-mentioned epichlorohydrin is added, and the NaOH is dissolved by constant stirring. NaCl crystals are precipitated;

[0022] 2. Add epichlorohydrin to the above-mentioned reaction solution again, and the mol ratio of epichlorohydrin and dodecylamine is controlled at 1:1 as much as possible, and the reaction temperature is controlled in the rang...

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Abstract

The invention relates to a cationic surface active initiator and a preparation method thereof. The method is characterized in that a tertiary amine compound containing bis-imidazole cation and didodecyl is synthesized, so that stronger emulsification function is presented by comparing with a common surfactant, simultaneously, tertiary amine and potassium persulphate are subjected to an oxidation reduction reaction at normal temperature, cation free radical is formed on the nitrogen atoms, then conversed to the carbon free radicals with adjacent position, the generation of the free radical enables multi-time repetition, polyphase series-connection polymerization is realized, polymerization of styrene and methyl acrylate as well as styrene and hydroxyethyl acrylate can be initiated on a water / oil interface in order, a segmented copolymer is obtained, the experiment proves that monomer feeding ratio and copolymer components ratio are consistent, initiation efficiency of the initiator is high, the polymerization condition in this mode is mild and controllable, energy consumption is low, other organic solvents and emulsifiers are not required, and products are pure and completely accord with green chemistry requirement.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis, in particular to a cationic surface active initiator and a chemical preparation method thereof. The novel initiator can be used for green synthesis of polyolefin polymer materials. Background technique [0002] Polyolefin is a kind of very important general polymer material, which is formed by radical polymerization of several olefin monomers. For different purposes, the structure can be adjusted according to the 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, respectively corresponding to the polymerization of oil-soluble and water-soluble monomers. Common initiators are compounds that can generate free radicals, such as oil-soluble peroxy, azo initiators and water-soluble persul...

Claims

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Application Information

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IPC IPC(8): C08F4/40C08F2/28C08F293/00C08F212/08C08F220/14C08F220/28C07D233/61
Inventor 孙怀艳李伟逊张瑞丰尚传洋江峰肖通虎龙能兵
Owner 宁波猎知乐科技咨询有限公司
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