Abstract
Dissolved oxygen is well known as an inhibitor in radical polymerization of vinyl monomer. Though the monomer solution is often saturated with argon or nitrogen to remove oxygen before polymer synthesis, there are few experimental data for the gas solubility. Thus, gas solubilities in solutions are reported for four binary systems. The solubilities of argon in styrene and nitrogen, oxygen or argon in methyl methacrylate (MMA) were measured at pressures up to 3.8 MPa, at 293, 303, 313 K. Gas solubilities at a given isotherm had linear pressure dependences, whereas Henry’s constants decreased with increasing temperature. Argon solubilities in MMA were about 1.35 times larger than those in styrene. Nitrogen and oxygen solubilities in MMA were about 1.53 and 1.35 times larger than those for styrene. Experimental data could be correlated with the Peng–Robinson equation of state to within AARDs of 0.85% for argon in styrene and 1.31%, 1.53% and 0.81% for argon, nitrogen and oxygen solubilities in MMA, respectively. The data and the correlation allow analysis not only for Henry constants but also for gas concentration in monomer solution at given temperature and pressure.
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Acknowledgements
This work is funded by the Ministry of Higher Education under Fundamental Research Grant Scheme (FRGS/1/2018/TK02/UTM/01/6), and a part of this work is also supported by Research University Grant 1/2017 Tier 1 (No. 20H17) in Malaysia. The authors thank Prof. Dr. Katsuto Otake, belonging to Tokyo University of Science, Japan, for his advice on the methodology.
Funding
Fundamental Research Grant Scheme 2018 (FRGS/1/2018/TK02/UTM/01/6) in Malaysia: Measurement of argon solubility in styrene for polymerization process”. Research University Grant 1/2017 Tier 1 (No. 20H17) in Malaysia: Oxygen and nitrogen solubility measurement in methylmethacrylate and estimation of reaction rate from Phase Equilibrium Data.
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AJXL: Investigation, Writing—Original Draft. TT: Methodology, Budget, Supervision of AJXL, Writing—Review & Editing. LST: Co-supervision of AJXL, Writing—Review & Editing. RB: Calculation of gas solubility, Collection and analysis of literature. T-AH: Design and supply of glass cell. TF: Overall planning, Data analysis.
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Lai, A.J.X., Tsuji, T., Tan, L.S. et al. Argon Gas Solubility in Styrene and Nitrogen, Oxygen and Argon Gas Solubilities in Methyl Methacrylate at (293 to 313) K and at Pressures up to 3.8 MPa. J Solution Chem 50, 1008–1026 (2021). https://doi.org/10.1007/s10953-021-01101-7
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DOI: https://doi.org/10.1007/s10953-021-01101-7