The aging behavior of halogen-containing and halogen-free flame retardant polyethylene

PVC

nylon 6 and TPU in Chengdu and Lhasa soil environment was studied. The materials were buried in the soil for 1 year

2 years

4 years and 8 years

and the performance changes with burial time were tested. The results show that after 8 years of embedding

PVC and halogen-containing flame retardant polyethylene maintain good comprehensive performance index. The properties of nylon 6

low smoke halogen-free flame retardant polyethylene and TPU decline obviously with more serious aging phenomenon

and the soil environment in Chengdu has a greater impact on the aging of polymer materials

compared with Lhasa.