PVC/碳纳米管复合材料的制备

Preparation of PVC/carbon nanotubes composites

采用原子转移自由基聚合(ATRP)在多壁碳纳米管(MWNTs)表面接枝聚丙烯酸丁酯(PBA)得到MWNTs-PBA,并以此对聚氯乙烯(PVC)改性,采用熔融共混法制备了PVC/MWNTs-PBA复合材料。傅里叶变换红外光谱分析及透射电子显微镜观察结果表明:采用ATRP法成功地将PBA接枝到MWNTs的表面。接枝了聚合物的碳纳米管可以提高复合材料的结晶温度(5 oC左右)、耐热温度(20 oC左右);复合材料的流变性能、导电性能也同时得以提高。

Multi-walled carbon nanotubes （MWNTs） - polybutyl acrylate （PBA） copolymer was prepared by grafting PBA onto the surfaces of MWNTs through atom transfer radical polymerization （ATRP） and then, were used to modify polyvinyl chloride （PVC） to prepare PVC/MWNTs-PBA composites by melting blending method. The results of Fourier transform infrared spectroscopy （FTIR） and transmission electron microscopy （TEM） indicate that PBA was successfully grafted onto the surface of the MWNTs by means of ATRP method. The crystallization temperature and heat-resistant temperature of the composites respectively using MWNTs grafted with polymer were increased by about 5 ℃ and 20℃. Moreover, the rheological property and electrical conductivity were all improved.