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Controllable free radical polymerization process with thioether compound as chain transferring agent

A technology of thioether compound and chain transfer agent, which is applied in the field of controlled free radical polymerization, and can solve problems such as unsatisfactory controllable polymerization

Inactive Publication Date: 2006-06-21
SHANGHAI PLASTICS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molecular weight distribution of the obtained polymer is 2.2-2.3, and the polymer end group functionality is 0.61-2.5. From the experimental results, the molecular weight distribution is wide, and the polymer end group functionality is from 0.61 to 2.5. The data is scattered, so it can be said that Controlled polymerization is not ideal enough and needs to be further improved

Method used

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  • Controllable free radical polymerization process with thioether compound as chain transferring agent
  • Controllable free radical polymerization process with thioether compound as chain transferring agent
  • Controllable free radical polymerization process with thioether compound as chain transferring agent

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] A solution of 0.06g benzylphenyl sulfide in 4ml toluene was heated to 80°C, azoisobutyronitrile (AIBN) and styrene (0.0031g in 2ml styrene) were added continuously within 12 hours, and the reaction mixture was Sampling and analysis were carried out within a certain period of time. After the addition of the monomers, the reaction temperature was maintained at 90°C for 3 hours, and the conversion rate of the monomers was as high as 95%. The detailed results are shown in Table 1.

[0028] project

example 2

[0030] A solution of 0.06g of benzylphenyl sulfide in 4ml of toluene was heated to 75°C, AIBN and vinyl acetate (0.0040g in 2ml of vinyl acetate) were added continuously within 5 hours, and the reaction mixture was sampled within a certain period of time. After the addition, the temperature was maintained at 80° C. for 3 hours, and the final monomer conversion rate was as high as 95%. The detailed experimental results are shown in Table 2.

[0031] project

example 3

[0033] A solution of 0.05 g of benzylphenyl sulfide in 8 ml of toluene was heated to 80° C., AIBN and styrene (0.0031 g in 10 ml of styrene) were fed continuously within 15 hours, and the reaction mixture was sampled within a certain period, After the addition of the monomers, the reaction was carried out at 90°C for 3 hours, and the final conversion rate of the monomers was as high as 95%. The detailed results are shown in Table 3.

[0034] project

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Abstract

The controlled radical polymerization method using thioether compounds as chain transfer agents is suitable for producing polymers with narrow polydisperse molecular weight distribution, predictable polymer structure and molecular weight. Under the reaction conditions, the thioether compound chain transfer agent has better compatibility with a series of monomers. The process includes the polymerization process for preparing the polymer of general formula (A). ∴ The polymer of general formula (A) is composed of (i) from vinyl monomer (the structure is CH 2 = CUV), maleic anhydride, N-alkylmaleimide, N-arylmaleimide, dialkyl fumarate and cyclic polymer monomers , (ii) a thioether chain transfer agent having the general formula (C) and (iii) a free radical source generating free radicals is prepared by contact reaction. The controllable polydispersity of the polymer is a function of the molar ratio of (i), (ii) and (iii). The polymer produced by this method is suitable for the preparation of adhesives and coatings.

Description

technical field [0001] The present invention relates to a controllable free radical polymerization method, more specifically to a controllable free radical polymerization method using a thioether compound as a chain transfer agent. Background technique [0002] The choice of chain transfer agent is very important in the process of controlled free radical polymerization to be able to prepare polymers with predictable polymer structure and molecular weight, as well as to prepare polymers with narrow polydispersity and to impart end group functionality to polymers. Sulfide chain transfer agents can impart activity to free radical polymerization, and can also introduce novel end group functionality into polymers. In the prior art (macromoleacles, 1993, [26], 2240), an acrylic acid In the presence of tert-butyl ester in the presence of bis(4-aminophenyl) disulfide, a method for preparing α.ω-diamino-functionalized poly(tert-butyl acrylate) through free radical adjustment reaction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/38
Inventor 王文新邰红云吕蔚贺飞峰
Owner SHANGHAI PLASTICS RES INST CO LTD