Some polymers need a cross-linking agent for the controlled cross-linking process of polymers with a tendency to degradation during the radiation cross-linking process. While, on the other hand, other polymers do not need a cross-linking agent—predominantly there are cross-linking polymers. The Thermo-Plastic Elastomer (TPE) that was used belongs to this group of predominantly cross-linking polymers; however, this agent is added because of faster reaction times and smaller irradiation doses. Microindentation–tensile and tensile impact tests were carried out on a thermoplastic sample—with, and without, a cross-linking agent. Small changes were measured between these materials at low radiation doses, (up to 66 kGy); nevertheless, at higher doses, the influence of the cross-linking agent on the mechanical properties is significant.

Irradiated thermoplastic elastomers show significant mechanical property changes at higher radiation doses, but small changes at low radiation doses.

Mechanical Properties Changes of Irradiated Thermoplastic Elastomer

Key Takeaway: Irradiated thermoplastic elastomers show significant mechanical property changes at higher radiation doses, but small changes at low radiation doses.