Flexible polyurethane (PU) materials find extensive use in upholstery, mattresses, and automobiles, yet the molecular background of their odor is still inadequately understood. To address this gap, we aimed at identifying major odorants in fifteen samples representing eight common types of flexible PU materials. The volatiles isolated from the samples were subjected to activity-guided screening via gas chromatography-olfactometry. Structures were assigned by comparing odor, retention data, and mass spectra to those of authentic reference compounds. This approach led to the identification of 50 odorants, 39 of which had not previously been described in PU. The odorants belonged to a wide range of compound classes, including tertiary amines, fatty acid oxidation products, short-chain aldehydes, trioxocanes, pyrazines, aromatic hydrocarbons and heterocycles, chlorinated compounds, phenol derivatives, fragrance compounds, and nitriles. For some odorants, further insights were gained into their origins and release behavior. For example, the odorous 1,4-dimethylpiperazine had been used as a catalyst, and propanal was shown to be not only a PU odorant but also the precursor of an odor-active trioxocane. Additionally, the quantitation of acetaldehyde and propanal suggested their continuous regeneration from the samples. While the sources of other compounds still have to be clarified, the data obtained in this study could pave the way for odor reduction strategies in the production of PU materials, ultimately resulting in an improved odor and consumer experience.

Charlotte Minig

Klaas Reglitz

Martin Steinhaus

Indoor Air

建筑物内的环境质量是公共卫生的一个重要主题。INDOOR AIR 为报告非工业建筑物室内环境定义的广阔区域内的原始研究结果提供了一个场所。 INDOOR AIR 是一本具有多学科内容的国际期刊，发表的论文反映了该领域广泛的兴趣类别：健康影响；热舒适度；监测和建模；源表征；通风和其他环境控制技术。研究结果提供了基本信息，让设计师、建筑业主和运营商能够为建筑居住者提供健康舒适的环境，并为医疗从业者提供有关如何处理与环境相关的疾病的信息。室内环境。

The quality of the indoor environment in buildings is a significant public health issue. "Indoor Air" provides a platform for reporting original research findings across a broad spectrum of indoor environmental issues in non-industrial buildings. As an international journal with a multidisciplinary focus, "Indoor Air" publishes papers that reflect a wide range of interests in the field, including health impacts, thermal comfort, monitoring and modeling, source characterization, ventilation, and other environmental control technologies. The findings provide essential information for designers, building owners, and operators to create healthy and comfortable environments for occupants, as well as for healthcare practitioners to address environment-related health issues.

建筑物内的环境质量是公共卫生的重要主题。《Indoor Air》为报告非工业建筑物室内环境的广泛领域提供了一个原始研究结果的发布平台。《Indoor Air》是一份多学科的国际期刊，发表的论文涵盖了该领域的多个兴趣类别，包括健康影响、热舒适度、监测与建模、源特征、通风及其他环境控制技术。研究结果为设计师、建筑业主和运营商提供了基本信息，以帮助他们为建筑居住者创造健康舒适的环境，同时也为医疗从业者提供了处理与环境相关疾病的信息。

Category	Quartile
环境科学与生态学	2
环境科学与生态学, 结构与建筑技术	2
环境科学与生态学, 公共卫生、环境卫生与职业卫生	2
环境科学与生态学, 工程环境	3

Odor-Active Compounds in Flexible Polyurethane Materials

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Journal Info

Category	Quartile
PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH	1