Viscosity behavior of associated liquids at lower temperatures and vapor pressures

Thomas, Leo H.; Meatyard, R.; Smith, H.K.; Davies, Gwyn H.

doi:10.1021/je60082a011

Cited by 34 publications

(15 citation statements)

References 7 publications

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“…Figure 2 shows that T g,org of total OA (TOA) range from 232 to 334 K, depending on volatility distributions measured by different methods, while the most credible predicted T g,org values span in the range of 313-330 K. The reasons are stated below by comparing the different methods deriving the C * distributions. Stark et al (2017) used three methods (Thermograms, Partitioning, and Formulas) to derive volatility distributions by applying the measurements of organic acids (which were shown to account for about half of the total OA; Yatavelli et al, 2015) from a high-resolution chemical ionization time-of-flight mass spectrometer equipped with a filter inlet for gases and aerosols (Lopez-Hilfiker et al, 2014;Thompson et al, 2017). In the Thermograms method, C * at 298 K is estimated from the desorption temperature after calibration with known species (Faulhaber et al, 2009).…”

Section: Southern Oxidant and Aerosol Study (Soas)mentioning

confidence: 99%

Predictions of the glass transition temperature and viscosity of organic aerosols from volatility distributions

et al. 2020

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Abstract. Volatility and viscosity are important properties of organic aerosols (OA), affecting aerosol processes such as formation, evolution, and partitioning of OA. Volatility distributions of ambient OA particles have often been measured, while viscosity measurements are scarce. We have previously developed a method to estimate the glass transition temperature (Tg) of an organic compound containing carbon, hydrogen, and oxygen. Based on analysis of over 2400 organic compounds including oxygenated organic compounds, as well as nitrogen- and sulfur-containing organic compounds, we extend this method to include nitrogen- and sulfur-containing compounds based on elemental composition. In addition, parameterizations are developed to predict Tg as a function of volatility and the atomic oxygen-to-carbon ratio based on a negative correlation between Tg and volatility. This prediction method of Tg is applied to ambient observations of volatility distributions at 11 field sites. The predicted Tg values of OA under dry conditions vary mainly from 290 to 339 K and the predicted viscosities are consistent with the results of ambient particle-phase-state measurements in the southeastern US and the Amazonian rain forest. Reducing the uncertainties in measured volatility distributions would improve predictions of viscosity, especially at low relative humidity. We also predict the Tg of OA components identified via positive matrix factorization of aerosol mass spectrometer (AMS) data. The predicted viscosity of oxidized OA is consistent with previously reported viscosity of secondary organic aerosols (SOA) derived from α-pinene, toluene, isoprene epoxydiol (IEPOX), and diesel fuel. Comparison of the predicted viscosity based on the observed volatility distributions with the viscosity simulated by a chemical transport model implies that missing low volatility compounds in a global model can lead to underestimation of OA viscosity at some sites. The relation between volatility and viscosity can be applied in the molecular corridor or volatility basis set approaches to improve OA simulations in chemical transport models by consideration of effects of particle viscosity in OA formation and evolution.

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Section: Southern Oxidant and Aerosol Study (Soas)mentioning

confidence: 99%

Predictions of the glass transition temperature and viscosity of organic aerosols from volatility distributions

et al. 2020

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“…6 shows the regions representing extremely low volatility organic compounds (ELVOC; C 0 < 3 Â 10 À4 mg m À3 ), low-volatility organic compounds (LVOC; 3 Â 10 À4 < C 0 < 0.3 mg m À3 ), semivolatile organic compounds (SVOC; 0.3 < C 0 < 300 mg m À3 ), and intermediate volatility organic compounds (IVOC; 300 < C 0 < 3 Â 10 6 mg m À3 ). 81 Because smaller MW compounds are more volatile 117 and less viscous, 118,119 T g,org steadily decreases as C 0 increases. The T g,org values for the observed healthy and stressed compounds are similar under dry conditions.…”

Section: Viscosity Predictionsmentioning

confidence: 99%

Viscosity and liquid–liquid phase separation in healthy and stressed plant SOA

Smith

Crescenzo

Huang

et al. 2021

Environ. Sci.: Atmos.

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“…Bimolecular reactions have an intrinsic energy of diffusion. In water, the activation energy value, calculated from the temperature dependence of the solvent viscosity, 38,50,51 is 4.0 kcal mol À1 and in ethylene glycol it is 6.7 kcal mol À1 . The viscosity is also changed in the presence of ions, 37,52 e.g.…”

Section: Arrhenius Treatmentmentioning

confidence: 99%

Steady state and dynamic quenching of zinc tetramethylpyridylporphyrin by methyl viologen ion pairs. Salt effects

Togashi¹,

Costa²

2002

New J. Chem.

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Viscosity behavior of associated liquids at lower temperatures and vapor pressures

Abstract: value, 4.4 kcal, agrees well with the values obtained, e.g., by infrared spectroscopy (5).

Cited by 34 publications

References 7 publications

Predictions of the glass transition temperature and viscosity of organic aerosols from volatility distributions

Predictions of the glass transition temperature and viscosity of organic aerosols from volatility distributions

Viscosity and liquid–liquid phase separation in healthy and stressed plant SOA

Steady state and dynamic quenching of zinc tetramethylpyridylporphyrin by methyl viologen ion pairs. Salt effects

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