EVA/Al_2O_3纳米复合材料的制备方法与力学性能、结构研究  

Study on Preparation and Mechanical Properties and Structure of EVA/Nano-Al_2O_3 Composites

作　　者：李红姬[1] 张万喜[1] 梁波[1] 陈广义[1] 孙国恩[1] 

机构地区：[1]吉林大学材料科学与工程学院,吉林长春130025

出　　处：《高分子材料科学与工程》2006年第4期95-98,共4页Polymer Materials Science & Engineering

基　　金：国家863项目(2003AA302310)

摘　　要：采用熔融共混方法制备直接分散、一步法分散、二步法分散三种不同工艺的EVA/纳米A l2O3复合材料,并研究其力学性能,从中选取性能最佳的分散方式进一步表征纳米A l2O3在基体中的分散状态及结构。结果表明,三种复合体系的力学性能均得到提高,其中一步法复合体系在纳米A l2O3含量为1.5%时综合性能最佳,其拉伸强度与断裂伸长率分别提高了25.4%和12.1%。此外,A l2O3微粒是以20nm左右的粒径分散于EVA基体中,并与EVA形成了化学键合结构。EVA/Al2O3 nanocomposites of direct-dispersed, one-step and two-step were prepared by melt-blending. Through studying the properties of mechanical properties and the morphologies of fracture, the modification method of the nano-particles were selected and the kind of the nanocomposites were discussed on the dispersibility of nano-Al2O3 in EVA matrix and structures, the results show that all the mechanical properties of the three compound systems have been improved, and among these compound systems one-step＇s resultant effect is the best at the amount of nano-Al2O3 is 1.5%, the tensile strength and the elongation at break is respectively improved by 25% and 12%. Otherwise it is found that Alz03 particles with pore size of about 20nm disperse in EVA matrix, link with EVA through chemical bond.

关 键 词：纳米AL2O3 EVA 复合材料 力学性能 分散状态 

分 类 号：TB383[一般工业技术—材料科学与工程]