Evidence of plasma‐driven decomposition of common plastics exposed to an atmospheric nonthermal discharge

IF 2.9 3区 物理与天体物理 Q2 PHYSICS, APPLIED
Roxanne Z. Walker, Sophia Gershman, Dorothy E. Doughty, John E. Foster
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Abstract

A nonthermal, pulsed spark discharge is applied to three polymer powders in Ar and Ar– gas mixtures. Hydrogen is introduced to assess plasma‐driven decomposition. Gaseous decomposition products, including methane, acetylene, and ethylene, are observed with Fourier‐transform infrared (FTIR). Surface modifications are observed on the residual polymer via attenuated total internal reflection‐FTIR. Time‐averaged rotational, vibrational, and excitation temperatures are characterized in the discharge. The plasma density is found to be around , with rotational and vibrational temperatures ranging from 1500 to 2200 K and an excitation temperature of 1–2 eV. While spark properties did not change with either gas composition or polymer composition, it was determined that the addition of hydrogen promoted higher concentrations of gaseous phase products (promoting hydrogenolysis).

Abstract Image

暴露于大气非热能放电的普通塑料在等离子体驱动下分解的证据
对氩气和氩气混合物中的三种聚合物粉末进行了非热脉冲火花放电。引入氢气以评估等离子体驱动的分解。利用傅立叶变换红外光谱 (FTIR) 观察气态分解产物,包括甲烷、乙炔和乙烯。通过衰减全内反射-傅立叶变换红外光谱(FTIR)可观察到残留聚合物的表面改性。放电过程中的时间平均旋转温度、振动温度和激发温度都得到了表征。发现等离子体密度约为 ,旋转和振动温度为 1500 至 2200 K,激发温度为 1-2 eV。虽然火花特性不会随着气体成分或聚合物成分的变化而改变,但可以确定的是,氢的加入会提高气相产物的浓度(促进氢解)。
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来源期刊
Plasma Processes and Polymers
Plasma Processes and Polymers 物理-高分子科学
CiteScore
6.60
自引率
11.40%
发文量
150
审稿时长
3 months
期刊介绍: Plasma Processes & Polymers focuses on the interdisciplinary field of low temperature plasma science, covering both experimental and theoretical aspects of fundamental and applied research in materials science, physics, chemistry and engineering in the area of plasma sources and plasma-based treatments.
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