【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。更多还原

【Abstract】 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 LLDPE 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.更多还原