Cao Lin, Deng Shuling, Lin Zhidan
College of Science and Engineering, Jinan University, Guangzhou 510632, China.
Polymers (Basel). 2016 Feb 16;8(2):50. doi: 10.3390/polym8020050.
Carbon nanomaterial particles were selectively distributed in an incompatible and high-melting-temperature polymer blend interface, or in a particular phase, to obtain conductive composites. The composite products revealed poor morphology stability and mechanical performance due to processing several times. Poly(phenylene sulfide) (PPS) and poly(ether ether ketone) (PEEK) polymers with large differences of processing temperatures were selected as blend components to obtain a compatible blend. PPS/PEEK/multi-walled carbon nanotube (MWCNT) ternary nanocomposites were prepared using a controlled melt blending process. The composite samples with similar sausage-like structures of PEEK, as a dispersed phase, promote MWCNT to maximize concentration distribution in the PPS continuous phase. As a result, the theoretical percolation threshold of the composite reduced to 0.347 wt %. Moreover, the conductivity of the composite remained stable even after processing several times. CNTs revealed a particular effect when distributed selectively in this kind of system: it can enhance the dispersion of phases and also provide conductivity to the blend at small CNT contents, which can provide more useful ideas for the development of high-melting-temperature and antistatic or conductive plastic materials.
碳纳米材料颗粒被选择性地分布在不相容且高熔点的聚合物共混物界面或特定相中，以获得导电复合材料。由于经过多次加工，复合产品表现出较差的形态稳定性和机械性能。选择加工温度差异较大的聚（苯硫醚）（PPS）和聚（醚醚酮）（PEEK）聚合物作为共混组分，以获得相容共混物。采用可控熔体共混工艺制备了PPS/PEEK/多壁碳纳米管（MWCNT）三元纳米复合材料。具有类似香肠状结构的PEEK作为分散相的复合样品，促进了MWCNT在PPS连续相中的浓度分布最大化。结果，复合材料的理论渗流阈值降至0.347 wt%。此外，即使经过多次加工，复合材料的导电性仍保持稳定。当碳纳米管选择性地分布在这种体系中时，显示出特殊的效果：它可以增强相的分散性，并且在碳纳米管含量较少时也能为共混物提供导电性，这可为高熔点和抗静电或导电塑料材料的开发提供更多有用的思路。
