O2纳米粒子增强改性聚乙烯力学性能的研究Si.PDF

30 3 ( ) V ol 30 N o3 2005 6 Journal ofK unm ing U n iversity of Sc ience and T echnology ( Sc ience and T echnology) Jun 2005 SiO 2 1 2 郜华萍, 谭惠民 ( 1 , 650093; 2 , 10008 1) : 以不同比例的 SiO2 纳米粒子与mLLDPE / LDPE基材进行熔融共混所获得的复合材料为 研究对象, 力 性能测试和 SEMTEM 观察照片研究结果表明: 当使用经处理的 2% S iO2 纳米粒 子时, 其复合材料力 性能达到最佳值; 与纯mLLDPE /LDPE 相比, 拉伸强度断裂伸长率分别提 升了13 7 MP a和 174 9% , 表明了 SiO 无机纳米粒子被分散于基材中, 与基材形成牢固的界面结 2 合, 与基体树脂之间的链段发生缠结, 形成了有利于力 性能提高的界面结构 : 纳米二氧化硅; 聚乙烯改性; 力 性能; 熔融共混 : TQ 325 1 : A : 1007 - 855X ( 2005) 0 3- 00 35- 03 Study onM echanical Properties of PolyethyleneModified with Nano- SiO 2 1 2 GAO H ua-p ing , TA N H u-im in ( 1 D iv ision o f R esearch A dm inistration, K unm ing U n ive rs ity o f Science and T echno logy, K unm ing 65009 3, Ch ina; 2 Schoo l o f M ater ia ls Science and Eng ineer ing, Beijing In stitute of T echno logy, Be ij ing 10008 1, Ch ina) Abstract: Composite m aterial obta ined from m elt- blending nano- SiO2 w ith mLLDPE /LDPE in d ifferent propor- t ions is taken as the ob jective o f this research W hen the proportion of nano- SiO2 is 2% , the m echan ica l prop er- t ies o f the com posite m aterial are the best M eanw hile, comp ared w ith pure mLLDPE / LDPE, the tensile strength and break ing elongation percentage are increased by 13 7 MPa and 174 9% resp ect ively T hese results show that nano- S iO2 is disp ersed in mLLDPE / LDPE th at firm boundaries are form ed N ano- S iO2 is tang led in segm