Carbon dioxide-based copolymer foamed plastic and preparation method thereof

Abstract

The invention provides carbon dioxide-based copolymer foamed plastic. The carbon dioxide-based copolymer foamed plastic is prepared from the following raw materials in parts by weight: 100 parts of carbon dioxide cyclohexene oxide copolymer; 5-30 parts by weight of a carbon dioxide propylene oxide copolymer; 2-20 parts by weight of a toughening agent; and 0.1-1 part by weight of an ester exchangeagent. Compared with the prior art, the carbon dioxide-based copolymer foamed plastic provided by the invention takes the carbon dioxide-cyclohexene oxide copolymer as a main body foaming material andis matched with other specific content components to realize better interaction, and the obtained carbon dioxide-based copolymer foamed plastic is semi-hard or hard foam; and meanwhile, the foaming performance, the elasticity modulus and the compression strength are good. Experimental results show that the foaming ratio of the carbon dioxide-based copolymer foamed plastic provided by the invention can reach 10 times, the elastic modulus can reach 804 MPa, and the compression strength (50%) can reach 26 MPa.

Description

technical field [0001] The invention relates to the technical field of biodegradable foamed plastics, in particular to a carbon dioxide-based copolymer foamed plastic and a preparation method thereof. Background technique [0002] In the prior art, foamed plastics such as polyolefin plastic foam and polyurethane plastic foam have the advantages of light weight, heat insulation, sound absorption, and shock absorption, and are widely used as functional materials such as heat insulating materials and sound insulation materials. At the same time, it can also be used as the shell material for preparing vehicles, ships and other transportation tools. These plastic foams are lightweight and bulky when discarded, making them difficult to reuse. In addition, even if plastic foam is buried or burned, it will pollute the environment. [0003] In recent years, with global warming, the greenhouse gas carbon dioxide has attracted much attention, and the use of carbon dioxide as a cheap ...

AI Technical Summary

Problems solved by technology

Carbon dioxide-epoxycyclohexane copolymer (PCHC) is another carbon dioxide-based biodegradable material. Due to its high glass transition temperature (106°C-110°C), it is expected to be a biodegradable material that can be used at 100°C. Moreover, PCHC has high tensile strength and is suitable for the preparation of rigid biodegradable foams. At present, semi-rigid and rigid foams have been widely used, and are often used in heat insulation materials, interlayer materials, packaging materials, sound insulation and shockproof materials, building materials, etc. , these application scenarios are generally difficult to recycle and reuse, and are very suitable to be replaced by biodegradable materials; however, PCHC has problems such as high brittleness, poor thermal stability, and narrow processing window. The melt strength requirements are also very high, PCHC cannot meet the process requirements, and the physical foaming of PCHC alone with carbon dioxide also has a low expansion ratio, only 2 to 4 times, the foam is brittle, and the strength is insufficient.

However, the characteristics of PPC itself determine that the foams prepared with PPC as the main foaming material are soft foams, so carbon dioxide-based copolymers are still limited in the preparation of semi-rigid and rigid foams.

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