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首页> 外文期刊>Bulletin of the Korean Chemical Society >Effect of Carbon Nanofiber Structure on Crystallization Kinetics of Polypropylene/Carbon Nanofiber Composites
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Effect of Carbon Nanofiber Structure on Crystallization Kinetics of Polypropylene/Carbon Nanofiber Composites

机译：碳纳米纤维结构对聚丙烯/碳纳米纤维复合材料结晶动力学的影响

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摘要

Effect of heat treatment of carbon nanofibers (CNF) on electrical properties and crystallization behavior of polypropylene was reported. Two types of CNFs (untreated and heat treated at 2300 °C) were incorporated into polypropylene (PP) using intensive mixing. A significant drop in volume resistivity was observed with composites containing untreated 5 wt % and heat treated 3 wt % CNF. In non-isothermal crystallization studies, both untreated and heat treated CNFs acted as nucleating agents. Composites with heat treated CNFs showed a higher crystallization temperature than composites with untreated CNFs did. TEM results of CNF revealed that an irregular structure of CNFs can be converted into the continuous graphitic structure after heat treatment. Furthermore, STM showed that the higher carbonization temperature leads to the higher graphite degree which presents the larger carbon network size, suggesting that a more graphitic structure of CNFs led to a higher crystallization temperature of PP.
机译：据报道，碳纳米纤维（CNF）的热处理对聚丙烯的电性能和结晶行为的影响。使用强力混合将两种类型的CNF（未经处理和在2300°C热处理）掺入聚丙烯（PP）中。对于含有未处理的5wt％和热处理的3wt％CNF的复合材料，观察到体积电阻率显着下降。在非等温结晶研究中，未处理和热处理的CNF均充当成核剂。具有热处理的CNF的复合材料比未处理的CNF的复合材料具有更高的结晶温度。 CNF的TEM结果表明，热处理后CNF的不规则结构可以转变为连续的石墨结构。此外，STM显示，较高的碳化温度导致较高的石墨度，这表示较大的碳网络尺寸，这表明CNF的石墨结构越多，PP的结晶温度越高。

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