[Chemical Knowledge]：What material is PE?

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PE material is a common engineering plastic, known as polyethylene (Polyethylene), is a polymer made by polymerization of ethylene monomer. PE material has excellent physical and chemical properties and is widely used in people's daily life and industrial production. This article will introduce the nature, application, preparation method and environmental protection of PE materials from the following aspects.

1. the physical properties of PE materials.
PE materials have excellent physical properties, such as good impact resistance, high strength, good rigidity, good wear resistance, and light weight. In addition, PE material also has good low temperature performance, low temperature can still maintain a certain degree of toughness, which is one of the advantages of other plastics do not have.

2. the chemical properties of PE materials
the chemical properties of PE materials are very stable, not susceptible to acid, alkali and various organic solvents, has excellent corrosion resistance and aging resistance, and can be used for a long time under harsh environmental conditions. Although the thermal stability of PE material is not as good as most engineering plastics, it has good anti-ultraviolet properties and is not easy to be exposed to ultraviolet radiation and become yellow and brittle.

3. the application of PE materials The wide application of
PE materials is mainly concentrated in the following aspects:

1. Packaging industry: PE materials can be used to make plastic bags, plastic films, foam boxes and other packaging materials, with light weight, Durable, low price and other advantages.
2. Construction industry: PE material can be used to make urban water supply and drainage pipes, water pipes, home improvement water and electricity pipes, etc., with excellent corrosion resistance and wear resistance.
3. Automotive industry: PE materials can be used to make auto parts, such as brake systems, fuel systems, body parts, etc., with good low temperature performance and high strength.
4. Medical industry: PE material can be used to make all kinds of medical equipment, infusion bags, etc., with the advantages of safety, clean, non-toxic and so on. The preparation method of

4. PE material There are two main preparation methods of
PE material: one is high pressure method, and the other is low pressure method. The high-pressure method is the polymerization reaction of ethylene monomer under high pressure, processed by compression, cooling and other processes, and the low-pressure method is the polymerization reaction of ethylene gas under low pressure, and the polymerization reaction process is controlled by a chemical catalyst. The environmental protection problem of

5. PE material
With the development of social economy, the environmental protection problem has attracted more and more attention. PE materials will produce a certain amount of pollutants in the production process, such as waste water, waste gas, etc., which will affect the environment. At the same time, PE materials are difficult to degrade after use, which will pollute the natural environment. Therefore, the environmental protection of PE materials need to arouse our attention, and actively promote biodegradable substitute materials.