含碳链的光引发剂和交联剂在聚乙烯中的应用

Application of Photoinitiator and Multifunctional Monomers Containing Carbon Chains in PE-LLD

研究了含碳链的光引发剂二苯甲酮(BP)衍生物(BPL)和多官能团单体三烯丙基异三聚氰酸酯(TAIC)衍生物(STAIC)对聚乙烯的光引发交联作用及其在线形低密度聚乙烯(PE-LLD)中的热迁移损失情况,并与BP和TAIC进行了对比。结果表明,BPL和STAIC可组成高效的光引发交联体系,其最佳添加量分别是2.1份(质量份,下同)和2.0份;BPL和STAIC在PE-LLD中的热迁移损失程度远小于BP和TAIC;热迁移处理后,BPL的引发能力降低了3.6%,而BP的引发能力则降低了72.5%;STAIC的强化交联能力下降了46%,而TAIC则失去了强化交联能力。

A carbon-chain-containing photoinitiator（BPL）derived from benzophenone（BP）and a carbon-chain-containing multifunctional monomer（STAIC）derived from triallyl isocyanurate（TAIC） were used for photo-crosslinking of linear low-density polyethylene（PE-LLD）.Photoinitiation efficiency and thermal migration properties of BPL and STAIC in PE-LLD were investigated comparatively with BP and TAIC.The results indicated that combination of BPL and STAIC could initiate the photo-crosslinking of PE-LLD with high efficiency,and the optimum amounts of BPL and STAIC used for PE-LLD were 2.1and 2.0 phr,respectively.Thermal migration test revealed that BPL and STAIC exhibited a much lower thermal migration rate in PELLD than BP and STAIC,respectively.After thermal migration,the photoinitiation efficiency of BPL and BP decreased by 3.6 % and 72.5 %,respectively.Furthermore,the enhanced crosslinking efficiency for STAIC in PE-LLD decreased by 46 %,whereas TAIC showed little influence on the photo-crosslinking of PE-LLD.