Biodegradable polybutylene succinate (PBS) foaming material and preparation method thereof

Abstract

The invention provides a biodegradable polybutylene succinate (PBS) foaming material and a preparation method thereof. The biodegradable PBS foaming material is prepared by fully mixing components of 100 parts of a PBS resin, 0.1 to 10 parts of one or more chain extenders, 0.1 to 10 parts of one or more nucleating agents, 0.1 to 10 parts of one or more foaming stabilizers and 1.2 to 18 parts of a composite foaming agent by an extruder and carrying out extrusion and foaming molding, wherein the composite foaming agent comprises 1 to 10 parts of a supercutical fluid, 0.2 to 5 parts of second ingredient foaming agents and 0 to 3 parts of third ingredient foaming agents; and the second ingredient foaming agents comprise an azo-compound, sodium bicarbonate and / or citric acid, or a mixture containing polymer masterbatches of the azo-compound, sodium bicarbonate and / or citric acid; and the third ingredient foaming agents comprise ethanol, a butane, a pentane, methyl formate and / or dimethyl ether. The biodegradable PBS foaming material has good mechanical properties and biodegradable properties. The preparation method of the biodegradable PBS foaming material has high-continuity and stable production processes, is safe, does not produce environmental pollution and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a biodegradable foaming material and a preparation method thereof, in particular to providing a continuous extrusion method using polybutylene succinate (PBS), a chain extender and a foaming agent as main raw materials through melt blending The prepared foam material can be used to process various degradable foam sheets, plates, pipes and other products. Background technique [0002] The 21st century is an era of rapid development of polymer science and engineering. Polymer materials are used more and more in people's daily life and production, and in a sense, they have become a tool for evaluating a country's industrialization degree and social economy. , an important indicator of living standards. However, while traditional polymer plastics bring convenience to people's lives, the waste after use is difficult to degrade under natural conditions (ordinary plastics take 100-150 years to completely degrade), resulting in "white...

AI Technical Summary

Problems solved by technology

[0008] Throughout the research on PBS foaming materials in the prior art, it is found that the preparation of PBS foaming materials is mainly focused on chemical foaming after crosslinking PBS, but the gel produced after resin crosslinking will reduce the biodegradation of the resin. In addition, a part of the chemical blowing agent will remain in the product during the foam preparation process, which will affect product performance and use safety