Glass Transition Temperatures of Organic Mixtures from Isoprene Epoxydiol-Derived Secondary Organic Aerosol.

ABSTRACT: The phase states and glass transition temperatures (T_g) of secondary organic aerosol (SOA) particles are important to resolve for understanding the formation, growth, and fate of SOA as well as their cloud formation properties. Currently, there is a limited understanding of how T_g changes with the composition of organic and inorganic components of atmospheric aerosol. Using broadband dielectric spectroscopy, we measured the T_g of organic mixtures containing isoprene epoxydiol (IEPOX)-derived SOA components, including 2-methyltetrols (2-MT), 2-methyltetrol-sulfate (2-MTS), and 3-methyltetrol-sulfate (3-MTS). The results demonstrate that the T_g of mixtures depends on their composition. The Kwei equation, a modified Gordo

SUBMITTER: Chen B 

PROVIDER: S-EPMC10863072 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature