一种弹性共聚物与纳米SiO_2形成共混物力学性能研究(英文)  

Study on mechanical properties of blends made of a kind of elastomeric copolymer and Nano-SiO_2

作　　者：周诗彪[1] 肖安国[1] 郑清云[1] 王锟[1] 陈贞干[1] 张维庆[1] 郝爱平[1] 

机构地区：[1]湖南文理学院化学化工学院,湖南常德415000

出　　处：《湖南文理学院学报（自然科学版）》2011年第2期44-47,共4页Journal of Hunan University of Arts and Science(Science and Technology)

基　　金：湖南省自然科学基金(20772101);湖南省教育厅项目(2009FJ3037);常德市科技局课题(2010JC06)

摘　　要：将弹性共聚物PBA-g-PMMA与纳米SiO2在130～150℃温度下于双螺杆挤出机中混合制得了共混物.研究表明,随着共聚物的分子量、大分子单体数量及其分子量及纳米SiO2含量的增加,共混物的抗张强度和300%伸长时模量增强,而断裂伸长和永久形变下降.研究显示,当纳米SiO2与二元共聚物的质量比达3%,共混物的抗张强度和300%伸长时模量达到最大值;质量比在3%以上,随着纳米SiO2比例增加,共混物的抗张强度和300%伸长时模量会下降,而其永久形变没有变化.Blends were obtained by elastomeric copolymers, which were prepared by copolymerization of PMMA macromonomer, butyl acrylate in benzene using AIBN as initiator, mixing with nano-silica in double-screw extruder at 130-150 ℃. The tensile strength and modulus at 300% elongation of blends increase while ultimate elongation and permanent set decrease with molecular weight of copolymer, amount of PMMA macromonomer of copolymer, molecular weight of PMMA macromonomer, and nano-silica charged increase, respectively. The research also shows that tensile strength and modulus at 300% elongation of blends reach to maximum while mass ratio of nano-SiO2 to copolymer is up to 3%, and tensile strength and modulus at 300% elongation of blends decline and permanent set has no change as mass ratio of nano-SiO2 to copolymer is above 3%.

关 键 词：共混 自由基聚合 纳米SIO2 大分子单体 甲基丙烯酸甲酯 

分 类 号：O631.22[理学—高分子化学]