Polyester of biological carbonic-ester-contained structure and preparing method and application of biological polyester

Abstract

The invention provides polyester of a biological carbonic-ester-contained structure and a preparing method and application of the polyester. The structural formula of the polyester is shown in the description. The preparing method includes the steps of making one biological monomer in vanillic aldehyde, syringaldehyde and p-hydroxy benzaldehyde serve as the raw material to react with triphosgene under the effect of a catalyst, recrystallizing a reaction product to obtain a dialdehyde monomer of a biological carbonic-ester-contained structure, making the dialdehyde monomer serve as the raw material to react with sodium borohydride, conducting recrystallizing or column-passing separating on a reaction product to obtain a diol polymerizable monomer of a biological carbonic-ester-contained structure, making the diol polymerizable monomer react with acyl chloride under the effect of a catalyst, dropping a reaction product in an anti-solvent for regeneration, and conducting washing and purifying to obtain the polyester of the biological carbonic-ester-contained structure. The polyester is of the biological carbonic-ester-contained structure and is friendly to the environment; the preparing method of the polyester is simple, no harmful substances are generated in production, pollution is low, and cost is low.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a bio-based polyester containing a carbonate structure and a preparation method and application thereof. Background technique [0002] The over-exploitation of fossil resources has led to serious energy crisis and environmental problems, and the synthesis of environmentally friendly and renewable bio-based materials from bio-based monomers has attracted increasing attention as a substitute for petroleum-based products. The emergence of bio-based materials avoids the dependence of human beings on fossil resources, and has the advantages of low carbon and environmental protection. However, the current usage of bio-based materials is less than 1% of polymer materials. Therefore, bio-based materials will be one of the important directions for the future development of the polymer field. Research results have shown that bio-based materials are completely comparable to pet...

AI Technical Summary

Problems solved by technology

literature( Macromolecules, 1998, 31(22):7865-7870. ) It is reported that phosgene and bisphenol A are used to prepare cyclic polycarbonate materials, but because the phosgene used is highly toxic and a large amount of hydrogen chloride is produced as a by-product, it causes serious corrosion to the equipment, the production conditions are harsh, and the pollution is large. At the same time, its synthesis The molecular weight of polycarbonate is small, and the phosgene method has been basically eliminated

However, the cost of synthesizing cyclic carbonate is relatively high, and there is not much industrial application value

literature (Macromolecules, 2013, 46(9):3301- 3308.） It has been reported that polycarbonate is prepared by dimethyl carbonate and dibasic alcohol, but this method generates a large amount of azeotrope of methanol and dimethyl carbonate, and it needs complex treatment to reclaim methanol and dimethyl carbonate, resulting in The whole process of preparing polycarbonate diol is very complicated, and the organic volatiles such as methanol are very easy to pollute the environment.

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