Identification of polymers as major components of atmospheric organic aerosols.

نویسندگان

  • M Kalberer
  • D Paulsen
  • M Sax
  • M Steinbacher
  • J Dommen
  • A S H Prevot
  • R Fisseha
  • E Weingartner
  • V Frankevich
  • R Zenobi
  • U Baltensperger
چکیده

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.

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عنوان ژورنال:
  • Science

دوره 303 5664  شماره 

صفحات  -

تاریخ انتشار 2004