A kind of polythiourethane and preparation method thereof

Abstract

The invention belongs to the technical field of polymer materials, in particular to a polythiocarbamate and a preparation method thereof. The method provided by the invention uses carbon oxysulfide and 2-methylaziridine as raw materials, without using a catalyst, and can obtain polythiocarbamate by copolymerization under bulk or solvent conditions, and the reaction is preferably in the range of 0- carried out at a temperature of 120°C. The method developed by the invention has the following advantages: it can react by itself without a catalyst; the raw materials are cheap and easy to obtain, the synthesis is simple, and the toxic mercapto compounds and isocyanate compounds in the traditional system are not used; the prepared polythiocarbamate main chain The structure is clear and has a fully alternating structure; there are strong hydrogen bonds between molecules, excellent thermal properties, no metal residues and colorless; the synthesis process is simple and easy to operate, the reaction conditions are mild, the reaction rate is fast, and the reaction process is environmentally friendly. The material has a strong adsorption effect on heavy metal mercury ions, and can be used to adsorb mercury ions in water systems.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, and in particular relates to a polythiourethane and a preparation method thereof. Background technique [0002] Polythiourethane is a sulfur-containing nitrogen-containing polymer with excellent optical properties, chemical stability and thermal stability, and has broad potential application value in optical materials, high-performance fibers, adhesives and engineering plastics. Usually, polythiourethane is prepared by reacting dibasic or polythiol with dibasic or polyisocyanate. Due to the complex and cumbersome synthesis method of raw material dibasic thiol or polythiol, and the high toxicity of isocyanate, this synthetic route has great limitations. [0003] Carbon oxysulfide (COS) is an atmospheric pollutant released from the combustion of fossil fuels, coal gas, many chemical processes, volcanic eruptions, and the decay of plants or proteins. Carbon oxysulfide in the troposphere c...

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Problems solved by technology

[0007] So far, there has been no report on the direct copolymerization of carbon oxysulfide and ring nitrogen monomer 2-methylaziridine to generate polythiocarbamate with asymmetric chain structure, and there is no regioselective synthesis of polythiocarbamate Ester reports

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