PP/碳纳米管复合材料的结构与性能

Structure and Property of PP/Carbon Nanotubes Nanocomposites

采用原子转移自由基(ATRP)活性聚合方法在多壁碳纳米管(MWNT)表面接枝丙烯酸丁酯聚合物(PBA),并以此对聚丙烯(PP)进行改性。红外光谱(FT-IR)及透射电子显微镜(TEM)测试结果表明,采用ATRP法成功地将PBA接枝到多壁碳纳米管(MWNT)表面。采用熔融共混法制备了PP/MWNT复合材料,对其力学性能和耐热性能进行了研究,结果表明,接枝聚合物的碳纳米管提高了复合材料的拉伸强度和冲击强度,提高了PP的耐热性。MWNT-PBA和MWNT-COOH加入PP都能提高材料的性能,而MWNT-PBA比MWNT-COOH的作用更加明显。

Polybutyl acrylate （PBA） was grafted onto the surfaces of multiwalled carbon nanotubes （MWNT） via atom transfer radical polymerization （ATRP）,and MWNT-PBA was applied to modify PP. The results of FT-IR spectra and transmission electron microscopy（TEM） show that PBA has been grafted onto the surfaces of MWNT successfully. PP/multiwalled carbon nanotubes nanocomposites were prepared by melt blending,The mechanical properties and thermal resistance of nanocomposites were studied. The result shows that MWNT grafted polymer chain enhances the tensile strength and impact strength of nanocomposites,increases the heat resistance of PP. Moreover both of MWNT-PBA and MWNT-COOH can increase the capability of the nanocomposites,in comparing with MWNT-COOH,MWNT-PBA is more apparently.