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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical, thermal, and microwave properties of conducting composites of polypyrrole/polypyrrole-coated short nylon fibers with acrylonitrile butadiene rubber
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Mechanical, thermal, and microwave properties of conducting composites of polypyrrole/polypyrrole-coated short nylon fibers with acrylonitrile butadiene rubber

机译：聚吡咯/聚吡咯涂层尼龙短纤维与丙烯腈丁二烯橡胶的导电复合材料的机械，热和微波性能

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摘要

Pyrrole was polymerized in the presence of anhydrous ferric chloride as oxidant and p-toluene sulfonic acid as dopant. Polypyrrole-coated short nylon fibers were prepared by polymerizing pyrrole in the presence of short nylon fibers. The resultant polypyrrole (PPy) and PPy-coated nylon fiber (F-PPy) were then used to prepare rubber composites based on acrylonitrile butadiene rubber (NBR). The cure pattern, direct current (DC) conductivity, mechanical properties, morphology, thermal degradation parameters, and microwave characteristics of the resulting composites were studied. PPy retarded the cure reaction while F-PPy accelerated the cure reaction. Compared to PPy, F-PPy was found to be more effective in enhancing the DC conductivity of NBR. The tensile strength and modulus values increased on adding PPy and F-PPy to NBR, suggesting a reinforcement effect. Incorporation of PPy and F-PPy improved the thermal stability of NBR. The absolute value of the dielectric permittivity, alternating current (AC) conductivity, and absorption coefficient of the conducting composites prepared were found to be much greater than the gum vulcanizate. PPy and F-PPy were found to decrease the dielectric heating coefficient and skin depth significantly.
机译：在无水氯化铁作为氧化剂和对甲苯磺酸作为掺杂剂的存在下聚合吡咯。通过在尼龙短纤维的存在下聚合吡咯来制备涂覆有聚吡咯的尼龙短纤维。然后将所得的聚吡咯（PPy）和涂有PPy的尼龙纤维（F-PPy）用于制备基于丙烯腈丁二烯橡胶（NBR）的橡胶复合材料。研究了所得复合材料的固化模式，直流电（DC）电导率，机械性能，形态，热降解参数和微波特性。 PPy会延迟固化反应，而F-PPy会加速固化反应。与PPy相比，发现F-PPy在增强NBR的直流电导率方面更有效。在NBR中添加PPy和F-PPy后，抗张强度和模量值增加，表明具有增强作用。 PPy和F-PPy的结合改善了NBR的热稳定性。发现所制备的导电复合材料的介电常数，交流电（AC）电导率和吸收系数的绝对值远大于硫化橡胶胶。发现PPy和F-PPy显着降低了介电加热系数和趋肤深度。

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