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Silanes as Cross-linking Agents for Polyethylenes: Techno Brief

Crosslinking is a type of polymerization reaction that branches out from the main molecular chain to form a network of chemical links and cross-linking agents are added to resins to enable this process. This Cross-linking Agents guide is designed to help you understand more about the use of silanes as cross-linking agents in polyethylenes, focusing on the benefits and main applications.

Increased Maximum Operating Tempeatures with Silane

One key reason to Crosslink PE in applications such as Pipes or cables is to raise the thermal stability of the material under load.

PEX continuous service temperature is around 100-120°C. Figure 1 below compares thermo-mechanical deformation resistance versus temperature of various polymers.


Figure 1

The thermal-mechanical stability of PEX depends strongly on its degree of crosslinking (%gels). Figure 2 shows how % gel influences thermo-mechanical performances of PEX.


Figure 2

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