First, the basic concept of irradiation and non-irradiation of cross-linked polyethylene
Cross-linked polyethylene is a polymer material that can be cross-linked by irradiation. Irradiation cross-linking means that polyethylene is exposed to high energy radiation so that there is cross-linking between its molecular chains to form a three-dimensional network structure. This cross-linking method can improve the mechanical properties, thermal stability and chemical resistance of polyethylene. The non-irradiated polyethylene refers to the polyethylene material that has not been irradiated.
Second, the difference between cross-linked polyethylene irradiation and non-irradiation
1. Different mechanical properties
After radiation treatment, the mechanical properties of cross-linked polyethylene will be significantly improved. The cross-linked polyethylene has higher tensile strength and hardness, and it is also more resistant to wear. Unirradiated polyethylene, on the other hand, has less mechanical properties.
2. Different thermal stability
Radiation crosslinked polyethylene, due to the formation of a more stable three-dimensional network structure between its molecular chains, its thermal stability is relatively high. Unirradiated polyethylene is easy to soften and deform at high temperatures.
3 Different chemical resistance
Cross-linked polyethylene is chemically more stable and relatively resistant to chemicals. Unirradiated polyethylene, on the other hand, is relatively susceptible to changes in the presence of certain chemicals.
Iii. Summary
The difference between cross-linked polyethylene irradiated and non-irradiated mainly lies in mechanical properties, thermal stability and chemical resistance. The properties of polyethylene materials can be significantly improved through the treatment of radiation cross-linking. However, the properties of unirradiated polyethylene materials are relatively weak. Therefore, in practical applications, different materials need to be selected according to different needs.
