成核剂对LLDPE薄膜的结晶、透明及阻隔性能的影响  

Effects of Nucleating Agent on Crystallization and Transparency as Well as Barrier Property of LLDPE Films

作　　者：李树材[1] 李邦[1] 刘宏[1] 

机构地区：[1]天津科技大学材料科学与化学工程学院,天津300457

出　　处：《天津科技大学学报》2011年第5期32-35,共4页Journal of Tianjin University of Science & Technology

摘　　要：采用复配成核剂(TJSH)及山梨糖醇类成核剂(TM3),分别与线性低密度聚乙烯(LLDPE)熔融共混吹塑制膜.借助偏光显微镜(PM)和差示扫描量热仪(DSC),研究了LLDPE/成核剂的结晶性能与光学性能和阻隔性能的关系.结果表明:TJSH成核剂的加入提高了LLDPE的结晶度,使晶体结构细化,球晶尺寸明显减小、均匀细密,因而导致膜的雾度显著降低,阻隔性增加.LLDPE films added nuclceating agents were prepared in the blowing machine by means of melt extrusion, using the nucleating agent made by TJSH and TM3 nucleating agent, respectively. The relationship between the crystalline morphology and the properties has been studied by means of polarizing microscope （PM） and differential scanning calorime- ter （DSC）. The result indicate that with the addition of the nucleation agent made by TJSH, the degree of crystallinity increases, the spherulite size becomes smaller and more uniform, as result the LLDPE films show excellent transparency and favorable barrier properties.

关 键 词：成核剂 LLDPE 结晶形态 雾度 阻隔性 

分 类 号：TQ322.2[化学工程—合成树脂塑料工业]