The results showed that the import PE100 pipe materials were mainly butene-copolymerized HDPE, their Izods were two times higher than domestic materials and their OITs were longer.

• 结果表明,进口PE100级管材料主要是1-丁烯共聚的HDPE,其冲击强度大于国产管材料的两倍,氧化诱导期长。