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Chen B, Mirrielees JA, Chen Y, Onasch TB, Zhang Z, Gold A, Surratt JD, Zhang Y, Brooks SD. Glass Transition Temperatures of Organic Mixtures from Isoprene Epoxydiol-Derived Secondary Organic Aerosol. J Phys Chem A 2023; 127:4125-4136. [PMID: 37129903 PMCID: PMC10863072 DOI: 10.1021/acs.jpca.2c08936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 04/18/2023] [Indexed: 05/03/2023]
Abstract
The phase states and glass transition temperatures (Tg) 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 Tg changes with the composition of organic and inorganic components of atmospheric aerosol. Using broadband dielectric spectroscopy, we measured the Tg 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 Tg of mixtures depends on their composition. The Kwei equation, a modified Gordon-Taylor equation with an added quadratic term and a fitting parameter representing strong intermolecular interactions, provides a good fit for the Tg-composition relationship of complex mixtures. By combining Raman spectroscopy with geometry optimization simulations obtained using density functional theory, we demonstrate that the non-linear deviation of Tg as a function of composition may be caused by changes in the extent of hydrogen bonding in the mixture.
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Affiliation(s)
- Bo Chen
- Department
of Atmospheric Sciences, Texas A&M University, Eller O&M Building, 1204, 3150
TAMU, 797 Lamar Street, College Station, Texas 77843, United States
| | - Jessica A. Mirrielees
- Department
of Chemistry, University of Michigan, 930 N University Avenue, Ann Arbor, Michigan 48104, United States
| | - Yuzhi Chen
- Gillings
School of Global Public Health, Department of Environmental Sciences
and Engineering, University of North Carolina
at Chapel Hill, 170 Rosenau Hall, Campus Box #7400, 135 Dauer Drive, Chapel Hill, North Carolina 27599, United States
| | - Timothy B. Onasch
- Aerodyne
Research, Inc, 45 Manning
Road, Billerica, Massachusetts 01821, United States
| | - Zhenfa Zhang
- Gillings
School of Global Public Health, Department of Environmental Sciences
and Engineering, University of North Carolina
at Chapel Hill, 170 Rosenau Hall, Campus Box #7400, 135 Dauer Drive, Chapel Hill, North Carolina 27599, United States
| | - Avram Gold
- Gillings
School of Global Public Health, Department of Environmental Sciences
and Engineering, University of North Carolina
at Chapel Hill, 170 Rosenau Hall, Campus Box #7400, 135 Dauer Drive, Chapel Hill, North Carolina 27599, United States
| | - Jason D. Surratt
- Gillings
School of Global Public Health, Department of Environmental Sciences
and Engineering, University of North Carolina
at Chapel Hill, 170 Rosenau Hall, Campus Box #7400, 135 Dauer Drive, Chapel Hill, North Carolina 27599, United States
- College
of Arts and Sciences, Department of Chemistry, University of North Carolina at Chapel Hill, Campus Box #3290, 125 South Road, Chapel Hill, North Carolina 27599, United States
| | - Yue Zhang
- Department
of Atmospheric Sciences, Texas A&M University, Eller O&M Building, 1204, 3150
TAMU, 797 Lamar Street, College Station, Texas 77843, United States
| | - Sarah D. Brooks
- Department
of Atmospheric Sciences, Texas A&M University, Eller O&M Building, 1204, 3150
TAMU, 797 Lamar Street, College Station, Texas 77843, United States
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Lopez E, Koh YP, Zapata‐Hincapie JA, Simon SL. Composition‐dependent
glass transition temperature in mixtures: Evaluation of configurational entropy models*. POLYM ENG SCI 2022. [DOI: 10.1002/pen.26018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Evelyn Lopez
- Department of Chemical Engineering Texas Tech University Lubbock Texas USA
| | - Yung P. Koh
- Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh North Carolina USA
| | | | - Sindee L. Simon
- Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh North Carolina USA
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