线型低密度聚乙烯固相接枝丙烯酸丁酯的研究

Study on Solid-phase Grafting of Butyl Acrylate onto LLDPE

利用固相接枝共聚的方法,制备了线型低密度聚乙烯接枝丙烯酸丁酯(LLDPE-g-BA)共聚物。讨论了反应温度、反应时间、引发剂用量、单体浓度对接枝率的影响,结果表明:随着反应温度的升高,反应时间的延长,引发剂用量以及单体/聚合物比例的增加,接枝率提高,最高接枝率达到10.12%。并用红外光谱表征产物的结构。LLDPE-g-BA可明显改善PET/LLDPE复合材料的界面相容性及力学性能。

The butyl acrylate （BA） was grafted onto LLDPE by using the solid-phase graft copolymerization. The effects of the reaction temperature, the reaction time, the initiator concentration and monomer concentration on the grafting ratio were discussed. The results showed that the grafting ratio was increased with the increasing of reaction temperature, reaction time, initiator concentration and the proportion of monomer to polymer. The maximum grafting ratio was 10.12%. The structure of LLDPE-g-BA was characterized by means of IR spectrometry. LLDPE- g-BA could evidently improve the interface compatibility and mechanical properties of the PET/ LLDPE composite material.