This paper deals with the analysis of polymer materials of various composition and molecular structure using Laser-Induced Breakdown Spectroscopy (LIBS). To make the discussion more transparent, we studied structurally different polymer samples using LIBS in various atmospheres (air, He, Ar) and examined their influence on signal response. We chose aliphatic (PP, PA 66, POM) and aromatic (PS, ABS) polymers with/without heterogeneous atoms (N, O) in their backbone structure. The emission spectra of all examined polymers are exceedingly similar; they exhibit a characteristic atomic/ionic emission line from four biogenic elements (C, H, N, O) and specific molecular emission bands. We focused on intensities of spectral molecular bands such as carbon dimer (C₂ Swan system at 516.5 nm) and cyano (CN band at 338.3 nm) bands as a response to various atmospheres. Sources of molecular bands are native bonds and bonds created from an interaction of plasma with buffers gas molecules. Here, we present a correlation between the polymer structure and signal responses. Finally, Principal Component Analysis was used to further assess the influence of ambient atmospheres on the clustering of LIBS data originating from various polymer samples.

本文使用激光诱导击穿光谱法（LIBS）分析各种组成和分子结构的聚合物材料。为了使讨论更加透明，我们在不同的气氛（空气，He，Ar）中使用LIBS研究了结构不同的聚合物样品，并研究了它们对信号响应的影响。我们选择在主链结构中具有/不具有异质原子（N，O）的脂族（PP，PA 66，POM）和芳族（PS，ABS）聚合物。所有检查过的聚合物的发射光谱都极为相似。它们表现出来自四个生物成因元素（C，H，N，O）和特定分子发射带的特征性原子/离子发射谱线。我们专注于光谱分子带的强度，例如碳二聚体（C ₂天鹅系统在516.5 nm处）和氰基（CN在338.3 nm处）波段响应各种气氛。分子带的来源是天然键和等离子体与缓冲气体分子相互作用产生的键。在这里，我们介绍了聚合物结构和信号响应之间的相关性。最后，主成分分析用于进一步评估环境气氛对源自各种聚合物样品的LIBS数据聚类的影响。