Bio-based biodegradable polyester and synthesis method thereof

Abstract

The invention discloses bio-based biodegradable polyester and a synthesis method thereof and overcomes the defects of poor heat resistance and low notch strength of existing bio-based biodegradable polyester. By adjusting the molar ratio of sebacic acid to terephthalic acid in polysebacic acid-butylene terephthalate, the bio-based biodegradable polyester has stable biodegradability and excellent mechanical performance; the condensation polymerization reaction speed and the molecular chain structure are controlled and side reactions are reduced by introducing a reaction buffering agent. The content of biomass in replaceable polyethylene biodegradable plastics is increased, and a new idea of using castor-oil plant as a raw material of the plastic biodegradable material is explored.

Description

technical field [0001] The invention mainly relates to the synthesis field of bio-based polymer materials and biodegradable polymer materials, in particular to a bio-based biodegradable polyester polybutylene sebacate-terephthalate and a preparation method thereof. Background technique [0002] In 2018, the total amount of plastic used in the world has exceeded 500 million tons. Synthesizing these plastics requires a large amount of petroleum resources. The damage to the environment caused by the unrestrained exploitation of petroleum resources has long been beyond our imagination. At present, all plastics cannot be used effectively. Degradation and inadequate garbage classification also make it difficult to recycle plastics. Plastics are polluting the environment we depend on at an alarming rate. [0003] Developed countries such as Europe, the United States, and Japan have formulated and promulgated laws and regulations banning plastics, and listed whether the synthetic ra...

AI Technical Summary

Problems solved by technology

[0002] In 2018, the total amount of plastic used in the world has exceeded 500 million tons. Synthesizing these plastics requires a large amount of petroleum resources. The damage to the environment caused by the unrestrained exploitation of petroleum resources has long been beyond our imagination. At present, all plastics cannot be used effectively. Degradation and inadequate garbage classification also make it difficult to recycle plastics. Plastics are polluting the environment we live on at an alarming rate

Although PBAT has excellent performance in all aspects and can replace polyethylene in large quantities, all its synthetic raw materials are still derived from petroleum; and PLA, although all synthetic raw materials are obtained through starch fermentation, has the defects of poor heat resistance and low notch strength. hard to use alone

[0005] China's castor production accounts for about 20% of the world's total output, and more than 90% of castor oil and castor derivatives are exported to the United States, France, Britain, Germany and other countries in the form of basic raw materials, and their potential value has not been fully realized. to develop