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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >A model for plasma modification of polypropylene using atmospheric pressure discharges
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A model for plasma modification of polypropylene using atmospheric pressure discharges

机译：利用大气压放电对聚丙烯进行等离子体改性的模型

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摘要

Atmospheric pressure plasmas are commonly used to improve the wetting and adhesion properties of polymers. In spite of their use, the mechanisms for achieving these properties are unclear. In this regard, we report on a computational investigation of the gas phase and surface kinetics during humid-air corona treatment of polypropylene (PP) and the resulting modification of its surface properties while varying energy deposition, relative humidity (RH), web speed, and gas temperature. Using results from a global plasma chemistry model validated against experiments, we found that increasing energy deposition increased the densities of alcohol, carbonyl, acid, and peroxy radicals on the PP surface. In doing so, significant amounts of gas phase O-3 and NxOy are produced. Increasing the RH increased the production of peroxy and acid groups, while decreasing those of alcohol and carbonyl groups. Production of O-3 decreased while that of HNO3 increased. Increasing the temperature decreased the concentrations of alcohol, carbonyl, and acid groups on PP while those of the peroxy radicals increased. For a given energy deposition, higher web speeds resulted in decreased concentrations of alcohols, peroxy radicals, carbonyl, and acid groups on PP. [References: 67]
机译：大气压等离子体通常用于改善聚合物的润湿性和粘附性。尽管使用了它们，但是实现这些特性的机制还不清楚。在这方面，我们报告了对聚丙烯（PP）进行湿空气电晕处理期间气相和表面动力学的计算研究，以及在改变能量沉积，相对湿度（RH），幅材速度，和气体温度。使用经过实验验证的全球等离子体化学模型的结果，我们发现增加的能量沉积会增加PP表面上的醇，羰基，酸和过氧自由基的密度。这样做会产生大量的O-3和NxOy气相。相对湿度的增加增加了过氧和酸性基团的产生，同时减少了醇和羰基基团的过氧化物。 O-3的产量减少，而HNO3的产量增加。温度升高会降低PP上的醇，羰基和酸基的浓度，而过氧自由基的浓度会增加。对于给定的能量沉积，较高的纤维网速度导致PP中的醇，过氧自由基，羰基和酸基浓度降低。 [参考：67]

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