Castor-oil-based ordered polymer and preparation method thereof
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A castor oil-based, polymer technology, applied in the field of synthesis of castor oil-based three-wall polymers
Inactive Publication Date: 2014-09-17
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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[0006] In order to solve the problem that the multi-armed star-like polymer material in the prior art is a petroleum-based small molecule, the present invention adopts ATRP polymerization to prepare castor oil-based regular polymer
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[0031] The preparation process of the castor oil-based regular three-arm polymer is divided into two steps, the first step is to modify the castor oil into an ATRP initiator with three active polymerization centers, and the second step is to carry out ATRP active polymerization Synthetic sesame oil-based regular polymer;
[0032] In the process of preparing ATRP, the organic solvent used to dissolve castor is dichloromethane, tetrahydrofuran, chloroform, ether, etc.;
[0033] In the process of preparing ATRP, the catalyst used to catalyze the reaction between castor oil and 2-bromoisobutyl acyl is one of N,N-lutidine, triethylamine, pyridine, sodium carbonate, and sodium bicarbonate;
[0034] In the described preparation ATRP initiator process, temperature of reaction is 0~40 ℃;
[0035] The monomer described in the preparation ATRP active polymerization reaction is methyl methacrylate, butyl acrylate, butyl methacrylate, acrylate-2-hydroxyethyl ester, methacrylate-2-hydroxye...
Embodiment 1
[0048] Synthesis of castor oil-based ATRP polymerization macroinitiator:
[0049] Castor oil 10g, catalyst triethylamine 10.2g are dissolved in tetrahydrofuran, the temperature of solution is set as 5 ℃, after gradually dripping 23g2-bromoisobutyl acid bromide, react at 5 ℃ for 12 hours, filter , remove solvent and dry three steps and obtain castor oil-based ATRP polymerization macroinitiator; Synthetic process functional group changes as follows figure 2 shown.
Embodiment 2
[0051] Synthesis of castor oil-based ATRP polymerization macroinitiator:
[0052] Dissolve castor oil 10g, catalyst N,N-lutidine 12.3g in tetrahydrofuran, set the temperature of the solution to 5°C, gradually drop 23g of 2-bromoisobutyryl bromide, and react at 5°C 5 hours, obtained castor oil-based ATRP polymerization macroinitiator through three steps of filtering, removing solvent and drying; Synthetic process functional group changes and figure 2 Same as shown.
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Abstract
The invention relates to a castor-oil-based ordered polymer and a preparation method thereof. The preparation method comprises the following steps of: dissolving castor oil in an organic solvent, adding dibromo-isobutyl acyl bromide or / and a catalyst, reacting at a specific temperature, synthesizing an atom transferring free radical polymerization initiator based on castor oil base, then adding the initiator and the solvent to a reaction flask, sequentially adding cuprous bromide or cuprous chloride, a monomer and a ligand according to a certain proportion, feeding nitrogen and bubbling so as to remove oxygen, reacting for 1-24 hours at 50-120 DEG C, precipitating the polymer in methanol, and then filtering and drying to obtain the product. The castor-oil-based ordered polymer with different molecular weights and molecular weight distribution can be obtained by the method and has very good application prospect in the aspects of coatings, surface active agents, medicines and the like.
Description
technical field [0001] The invention relates to a preparation method of a castor oil-based regular polymer, in particular to a synthesis of a castor oil-based three-wall polymer. Background technique [0002] Castor is one of the top 10 oil crops and 4 non-edible oil crops in the world, with a maximum output of 1.8 million tons per year. my country is a major producer of castor oil. The development and development of its derivative products have a wide range of raw materials and low prices. Adequate supply and other advantages. With the advancement of science, more and more products are produced from fatty acids, and the economic significance is becoming more and more important. These basic chemicals undergo chemical reactions such as hydrogenation and epoxidation to produce a variety of downstream derivative products, such as lubricants, surface active Agents and plasticizers, polymer polymer materials, etc., develop new applications, extend the industrial chain downstream,...
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