Biodegradable poly-terephthalic acid type foaming material and preparation method thereof

Abstract

The invention relates to a biodegradable poly-terephthalic acid type foaming material and a preparation method thereof. The foaming material is prepared by the following method that (1) poly-terephthalic acid type plastics and a degradation agent are put into a first multiple screw extruder; shear melting is performed to form a first hot melt with mobility; (2) the first hot melt is pumped into ascrew reactor; then, a chain extender is added for reaction; (3) the reacted melt body is then pumped into a second multiple screw extruder; then, a cross-linking agent, a nucleating agent and a foaming agent are added; mixing and homogenizing are performed; (4) a homogeneous melt body obtained in the step (3) is output and is foamed and formed. Compared with the prior art, the foaming material and the preparation method have the advantages that DNA sequence recombination is simulated for performing the processes of macromolecule degradation crushing, molecule fragment unordered reconstitutionand the like; a superhigh polymer structure with a multifunctional side chain and a functional fragment at a main chain is generated; the foaming operation time, the temperature window and the like are optimized; the physical property enhancement and the continuous controllable and stable forming of the poly-terephthalic acid type foaming material are realized.

Description

technical field [0001] The invention relates to the field of degradable foaming materials, in particular to a degradable polyterephthalic acid foaming material and a preparation method thereof. Background technique [0002] High molecular polymers have been widely used in the manufacture of all fields related to human life from aircraft to clothing, but because most of the polymers are derived from organic hydrocarbons, their waste cannot be degraded for decades or even hundreds of years, while Such polymers can be made directly or foamed into daily-use packaging materials, lunch boxes, consumables, electronic films, agricultural films and other fast-consumables. China alone produces millions of tons of non-degradable lunch boxes and non-degradable plastic packaging bags every year, and the average service life is less than 20 minutes. It has brought immeasurable pressure on the environment and resources, and the whole society, including the government, enterprises, and the...

AI Technical Summary

Problems solved by technology

China alone produces millions of tons of non-degradable lunch boxes and non-degradable plastic packaging bags every year, and the average service life is less than 20 minutes

However, limited by the structural properties and processing technology of the material itself, the understanding of the foaming principle, etc., the domestic control method for expanded thermoplastic polymer elastic materials is simple and unstable, especially for highly crystalline polymer materials, such as PLA, PET, PBT, PBS, PHA, etc., rarely have stable and controllable puffing cases in terms of material properties and processing technology

In addition, while improving the degradability of the existing degradable foaming materials, it is often difficult to ensure their good physical properties such as tensile strength, which makes the foaming materials degradable, but their own strength is not enough Durable, which seriously deviates from the original intention of the product

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