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首页> 外文期刊>Journal of Applied Polymer Science >In situ polymerization of aniline in the presence of carbon black
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In situ polymerization of aniline in the presence of carbon black

机译：炭黑存在下苯胺的原位聚合

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A hybrid material of polyaniline doped with dodecylbenzenesulfonic acid and conductive carbon black (PaniDBSA/CB) was prepared by in situ polymerization. The presence of low amount of CB (up to 25 wt %) resulted in a decrease in resistivity as compared to pure PaniDBSA. Composite with 25 wt % of CB presented the lowest resistivity and a tubular morphology characterized by microtubules with high aspect ratio evidenced by SEM examination. Higher amount of CB give rise to materials with higher resistivity values and a granular morphology, similar to pure carbon black. Ultraviolet-visible and electron paramagnetic resonance analyses were employed to evaluate the polaron concentration. X-ray diffraction was used to characterize the molecular structure of these composites. It was observed a decrease in the crystallinity degree and a shift of the polaron band transition toward lower wavelength as the amount of CB in the composite increases. From the EPR measurements, one can suggest that the higher chain order and polaron mobility is observed in hybrid with 25% of CB. This behavior is in agreement to the electrical resistivity values and SEM microscopy. The effect of CB on thermal stability of the composites was also investigated. The effect of the PaniDBSA/CB hybrid material on the processability and resistivity of the composites based on styrene-butadiene-styrene (SBS) block copolymer as the insulating matrix have been also evaluated. (c) 2006 Wiley Periodicals, Inc.
机译：通过原位聚合制备了掺杂有十二烷基苯磺酸和导电炭黑的聚苯胺杂化材料（PaniDBSA / CB）。与纯PaniDBSA相比，少量CB（最高25 wt％）的存在导致电阻率降低。具有25 wt％的CB的复合材料呈现出最低的电阻率和管状形态，其特征在于具有高长宽比的微管，通过SEM检查得到证实。与纯炭黑类似，较高的CB量会产生具有较高电阻率值和颗粒形态的材料。紫外可见和电子顺磁共振分析用于评估极化子浓度。 X射线衍射被用来表征这些复合材料的分子结构。观察到随着复合物中CB含量的增加，结晶度降低，极化子带向较低波长的转变。从EPR测量结果可以看出，在与25％的CB混合时，观察到较高的链级和极化子迁移率。此行为与电阻率值和SEM显微镜一致。还研究了炭黑对复合材料热稳定性的影响。还评估了PaniDBSA / CB杂化材料对以苯乙烯-丁二烯-苯乙烯（SBS）嵌段共聚物为绝缘基质的复合材料的可加工性和电阻率的影响。 （c）2006年Wiley Periodicals，Inc.

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