Biological-based polyamide and preparation method thereof

Abstract

The invention relates to biological-based polyamide and apreparation method thereof. Biological bases 1,9-azelaic acid and 1,10-decamethylene diamine prepared by adopting renewable biological resources perform direct melting condensation reaction, the biological-based polyamide can be obtained and is specifically biological-based polyazylenediamine.Only water is used as a solvent in the whole synthetic process without any organic solvent or additive, so that the phenomenon that introduced organic solvents and additives change the physical and chemical parameters and properties of the monomersand amine salt in the polymerization process and accordingly the whole polymerizing technological process is influenced can be prevented. The water is used as the solvent, so that the biological-based polyamide is clean and environmentally friendly and conforms to the purpose that biological-based high-molecular materials are green, environmentally friendly and cyclically regeneratable. In addition, the water is used as the solvent, a reaction medium is provided in the polymerization process, and energy transfer, charging and follow-up reaction are promoted.

Description

technical field [0001] The invention relates to the field of bio-based polymer materials, in particular to a bio-based polyamide and a preparation method thereof, in particular to a bio-based polyhexamethylene azelate and a preparation method thereof. Background technique [0002] Since the beginning of the 20th century, the germination of polymer materials has opened a new chapter for human beings to explore and apply materials science. The source of polymer materials has gradually developed from the initial natural polymer materials (such as rubber, animals, plant fibers, etc.) Transitioning to petrochemical resources, while satisfying the materials used by human beings, the issue of sustainable development is undoubtedly an urgent problem that needs to be thought, explored and solved practically. [0003] Polyamide, referred to as PA, is called nylon in the industry, and has been developed for more than 80 years. With its excellent comprehensive properties, polyamide has...

AI Technical Summary

Problems solved by technology

This type of reaction is usually considered to be divided into two steps. On the one hand, the operation steps and process are complicated, and the raw material consumption and equipment requirements are relatively high; using ethanol and other solvents to dissolve monomers such as reactions will consume a large amount of organic solvents. , which is not conducive to environmental protection, but also increases the difficulty of post-processing work; on the other hand, the condensation stage needs to be exhausted under conditions such as high temperature and high pressure, which will cause serious escape of monomers in the reaction system and an imbalance in the ratio of monomers

Therefore, in the reaction process, the hexamethylenediamine monomer needs to be in excess of about 5%, and the excess of the monomer will play a role of end-capping, resulting in a decrease in the molecular weight and performance of the polymer.

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