Kalberer, MarkusPaulsen, DwaneSax, MirjamSteinbacher, MartinDommen, JosefPrévôt, André S.H.Fisseha, RebekaWeingartner, ErnestFrankevich, VladimirZenobi, RenatoBaltensperger, Urs2024-08-132024-08-1320040036-80751095-920310.1126/science.1092185https://irf.fhnw.ch/handle/11654/46782<jats:p>Results from photooxidation of aromatic compounds in a reaction chamber show that a substantial fraction of the organic aerosol mass is composed of polymers. This polymerization results from reactions of carbonyls and their hydrates. After aging for more than 20 hours, about 50% of the particle mass consists of polymers with a molecular mass up to 1000 daltons. This results in a lower volatility of this secondary organic aerosol and a higher aerosol yield than a model using vapor pressures of individual organic species would predict.</jats:p>en550 - GeowissenschaftenIdentification of polymers as major components of atmospheric organic aerosols01A - Beitrag in wissenschaftlicher Zeitschrift1659-1662