多孔PMMA/SiO2纳米复合材料的制备及其力学性能  

Preparation and Mechanical Properties of Porous PMMA/SiO_2 Nanocomposites

作　　者：姜勇[1] 胡朝晖[1] 丁燕怀[1] 尹久仁[1] 许福[1] 张平[1] 

机构地区：[1]湘潭大学土木工程与力学学院,湘潭大学流变力学研究所,湖南湘潭411105

出　　处：《材料科学与工程学报》2010年第3期362-365,共4页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(10672138);湖南省教育厅重点资助项目(07A071,09C951);湘潭大学资助项目(08XZX28)

摘　　要：通过甲基丙烯酸甲酯本体聚合发泡的新方法,制备了多孔PMMA/SiO2纳米复合材料。对所得复合材料的压缩力学性能进行了研究,分析了实验结果。实验结果表明,复合材料的压缩应力-应变曲线具有多孔泡沫材料明显的三阶段特征即线弹性段、塑性屈服平台段及致密段;随着复合材料中纳米颗粒含量的增加,材料的压缩弹性模量和抗压强度也随之增大;而对于同一纳米颗粒含量的复合材料来说,随着变形速率的增大,材料的抗压强度随之增大。Porous polymethyl methacrylate（PMMA）/SiO_2 nanocomposites were prepared by polymerization foaming method.Their mechanical properties were studied and the experiment results were analyzed.The results indicate that the compressive stress-strain curves of the nanocomposites have obvious three-stage characters of the porous foams,i.e.,linear elastic stage,plastic yield flat stage and compact stage.Along with increasing the content of nanoparticles in the nanocomposites,the compressive elastic modulus and compressive strength of the nanocomposites increase.At the same content of nanoparticles,the compressive strength increases with increasing the strain rate.

关 键 词：甲基丙烯酸甲酯 PMMA SIO2 压缩力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TB383