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首页> 外文期刊>Journal of Applied Polymer Science >Conducting bicomponent fibers obtained by melt spinning of PA6 and polyolefins containing high amounts of carbonaceous fillers
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Conducting bicomponent fibers obtained by melt spinning of PA6 and polyolefins containing high amounts of carbonaceous fillers

机译：通过将PA6和含有大量碳质填料的聚烯烃熔融纺丝获得的双组分导电纤维

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摘要

Melt spinning of conductive polymer composites (CPCs) is coupled with some difficulties such as a decrease of conductivity upon drawing and a reduced spinnability with increasing filler concentration. Applying bicomponent technology may provide the possibility to produce fibers from CPCs with a high filler concentration. A pilot-scale bicomponent melt spinning set-up was used to produce core/sheath fibers with fiber titers between 13 and 47 dtex. The sheath material was polyamide 6 (PA6) or polypropylene (PP) and the core material was a CPC. Two CPCs were used, polypropylene (PP) with carbon black (CB), denoted by PP/CB, and polyethylene (PE) with multiwalled carbon nanotubes (MWNT), denoted by PE/MWNT. The results showed that both materials could be used with a filler concentration of 10 wt % to obtain melt draw ratios up to 195. The volumetric fraction of core material in the bicomponent structure was 28%. A heat treatment of PP/CB fibers restored the conductivity to the level of the undrawn material, corresponding to an increase in conductivity by a factor 5. The same heat treatment had a positive effect on the conductivity of PE/MWNT fibers although the conductivity was not restored.
机译：导电聚合物复合材料（CPC）的熔融纺丝会带来一些困难，例如拉丝时电导率的降低以及随着填料浓度的增加而降低的可纺性。应用双组分技术可能提供了从具有高填料浓度的CPC生产纤维的可能性。中试规模的双组分熔体纺丝设备用于生产纤度在13至47 dtex之间的芯/皮纤维。皮材料是聚酰胺6（PA6）或聚丙烯（PP），芯材料是CPC。使用了两种CPC，一种是用碳黑（CB）表示的聚丙烯（PP），用PP / CB表示，另一种是用多壁碳纳米管（MWNT）表示的聚乙烯（PE），用PE / MWNT表示。结果表明，两种材料都可以以10 wt％的填料浓度使用，以获得高达195的熔体拉伸比。双组分结构中芯材的体积分数为28％。 PP / CB纤维的热处理将电导率恢复到未拉伸材料的水平，这对应于电导率增加了5倍。相同的热处理对PE / MWNT纤维的电导率具有积极影响，尽管电导率为没有恢复。

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