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Dispersion polymerization of styrene in CO2-expanded ethanol
journal contribution
posted on 2023-05-18, 08:45 authored by Pu, DW, Devitt, MP, Stuart ThickettStuart Thickett, Lucien, FP, Zetterlund, PBDispersion polymerization of styrene has been performed in CO2-expanded ethanol at ≤9 MPa and 70 °C using PVP as stabilizer. The polymerizations proceeded with good colloidal stability, resulting in spherical particles of diameters of ∼2 μm. Pressurization with CO2 leads to an increase in particle size (∼1 μm in the corresponding CO2-free system), and a decrease in both polymerization rate and molecular weight. The main effect of CO2 is proposed to be its influence on the partitioning of monomer between the continuous and the particle phase–the results indicate that CO2-pressurization causes a reduction in monomer concentration in the particles. Overall, the results are consistent with literature data on the effects of the polarity of the continuous phase in dispersion polymerization of styrene in alcohols and alcohol/water mixtures.
History
Publication title
PolymerVolume
54Issue
25Pagination
6689-6694ISSN
0032-3861Department/School
School of Natural SciencesPublisher
Elsevier Sci LtdPlace of publication
The Boulevard, Langford Lane, Kidlington, Oxford, England, Oxon, Ox5 1GbRights statement
Copyright 2013 Elsevier Ltd.Repository Status
- Restricted