Establishing the emission profile of volatile organic compounds generated during fused deposition modeling 3D printing using polymer filaments is important in terms of both understanding the processes taking place during thermal degradation of thermoplastics, and assessing the user's exposure to potentially harmful volatiles. However, obtaining detailed, real-time qualitative and quantitative results poses a challenge. In this paper solid-phase microextraction-gas chromatography-time-of-flight mass spectrometry and proton transfer reaction time-of-flight mass spectrometry were used to identify and monitor the emission of volatiles during thermal degradation of polylactide filaments and during 3D printing. Filaments of two different grades and three colours were used. It was possible to obtain detailed, time- and temperature-resolved emission profiles of the main products of thermal decomposition of lactide and polylactide 3D printing filaments at concentration levels of a few μg/g. This revealed different temperature-dependent emission characteristics of particular volatiles, such as, among others, lactide, acetaldehyde, acetic acid, and 2-butanone between various polylactide 3D printing filaments. This approach can be used to monitor the emission associated with printing with various other types of polymer 3D printing materials.

使用聚合物长丝建立熔融沉积建模 3D 打印过程中产生的挥发性有机化合物的排放曲线对于理解热塑性塑料热降解过程中发生的过程和评估用户暴露于潜在有害挥发物的情况都很重要。然而，获得详细、实时的定性和定量结果是一项挑战。在本文中，固相微萃取-气相色谱-飞行时间质谱法和质子转移反应飞行时间质谱法用于识别和监测聚乳酸长丝热降解和 3D 打印过程中挥发物的排放。使用了两种不同等级和三种颜色的长丝。可以得到详细的，丙交酯和聚丙交酯 3D 打印长丝热分解的主要产物在几微克/克的浓度水平下的时间和温度分辨发射曲线。这揭示了特定挥发物（例如丙交酯、乙醛、乙酸和 2-丁酮等）在各种聚丙交酯 3D 打印长丝之间具有不同的温度依赖性排放特性。这种方法可用于监测与各种其他类型的聚合物 3D 打印材料打印相关的排放。和 2-丁酮在各种聚乳酸 3D 打印长丝之间。这种方法可用于监测与各种其他类型的聚合物 3D 打印材料打印相关的排放。和 2-丁酮在各种聚乳酸 3D 打印长丝之间。这种方法可用于监测与各种其他类型的聚合物 3D 打印材料打印相关的排放。