Polystyrene is a thermoplastic that is widely used in industry to manufacture of various materials. In this work, the objective was to investigate the effect of the Crystal Violet (CV) dye on polystyrene films under visible light. The films were produced by the casting method. Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and viscosimetry were used to monitor the effect of radiation and ¹H Nuclear Magnetic Resonance (¹H-NMR) was employed to evaluate the interaction between the polymer and the dye. Carbonyl Index confirmed that oxygenated species were formed during exposure to light and photo-oxidation is the major mechanism involved in CV-sensitized PS degradation. The variations in relaxation times indicated that electrostatic attraction is the main form of interaction between the materials involved and molecular dynamics calculations confirm the ¹H-NMR results. The CV dye could initiate degradation reactions and acted as an efficient photosensitizer in PS matrices.

聚苯乙烯是一种热塑性塑料，广泛用于工业生产各种材料。在这项工作中，目的是研究可见光下的结晶紫（CV）染料对聚苯乙烯薄膜的影响。膜通过流延方法生产。傅立叶变换红外光谱（FTIR），扫描电子显微镜（SEM）和粘度测定法用于监测辐射和¹ H核磁共振的影响（¹1 H-NMR用于评估聚合物和染料之间的相互作用。羰基指数证实了氧化物质是在曝光期间形成的，而光氧化是CV敏化PS降解的主要机理。弛豫时间的变化表明，静电吸引是所涉及材料之间相互作用的主要形式，分子动力学计算证实了¹ H-NMR结果。CV染料可以引发降解反应，并在PS基质中充当有效的光敏剂。