Comparing the three PEXs corresponding respectively to three different density polyethylenes LDPE, LLDPE, HDPE, we find that gel content is highest for LLDPE, lowest for HDPE, and intermediate for LLDPE.

• 在低密度聚乙烯( LDPE)、高密度聚乙烯 ( HDPE)、线形低密度聚乙烯 ( LLDPE) 3种不同密度聚乙烯制得的交联料中 ,交联度由大到小的次序为 LDPE>LLDPE>HDPE;