辐照改性LLDPE及增容增韧作用  

Irradiation Modification of LLDPE and Its Compatibilization and Toughening Effect

作　　者：陈正年[1] 迟波[1] 吴石山[1] 沈健[1] 

机构地区：[1]南京大学化学化工学院,江苏南京210093

出　　处：《高分子材料科学与工程》2006年第6期138-140,共3页Polymer Materials Science & Engineering

基　　金：江苏高校高新技术项目资助(JH02-071);南京大学大型仪器开放测试基金资助(0205001324)

摘　　要：采用FT-IR、XRD、SEM和力学性能测试等研究了紫外辐照对线性低密度聚乙烯(LLDPE)的结构与性能的影响,以及辐照改性LLDPE的增容作用。结果表明,通过紫外辐照,在LLDPE分子链上引入了C=O和C-O等基团。辐照改性LLDPE的晶面间距没有发生变化,但是其拉伸强度和断裂伸长率下降。制备了尼龙66/辐照改性LLDPE(90/10)复合材料。辐照改性LLDPE与尼龙66之间的相容性好,辐照改性LLDPE对尼龙66具有较好的增容增韧作用。The structure and properties of low-density polyethylene （LLDPE） modified through ultraviolet irradiation in air and the compatibilization of modified LLDPE were studied by FT-IR, XRD, SEM and mechanical properties test. The oxygen containing groups such as C- O, C=O and --OH were introduced onto I.I.DPE chains through ultraviolet irradiation in air. Compared with LLDPE, the space of crystal plane of modified LLDPE did not change. However, its tensile strength and elongation at break decreased. The nylon 66/modified LLDPE composites were prepared. The compatibility between the modified LLDPE and nylon 66 was well and modified LLDPE showed batterer compatibilization and toughening effect. The notched impact strength, tensile strength and bending strength of nylon 66/modified LLDPE composites increased by about 130%, 30% and 27% compared with those of nylon 66/LLDPE composites.

关 键 词：辐照改性线性低密度聚乙烯 增容增韧作用 尼龙66/线性低密度聚乙烯复合材料 

分 类 号：O631.34[理学—高分子化学]