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Dispersion polymerization of styrene in CO2-expanded ethanol

Citation

Pu, DW and Devitt, MP and Thickett, SC and Lucien, FP and Zetterlund, PB, Dispersion polymerization of styrene in CO2-expanded ethanol, Polymer, 54, (25) pp. 6689-6694. ISSN 0032-3861 (2013) [Refereed Article]

Copyright Statement

Copyright 2013 Elsevier Ltd.

DOI: doi:10.1016/j.polymer.2013.10.036

Abstract

Dispersion 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.

Item Details

Item Type:Refereed Article
Keywords:dispersion polymerization, radical polymerization, carbon dioxide
Research Division:Chemical Sciences
Research Group:Macromolecular and Materials Chemistry
Research Field:Synthesis of Materials
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Thickett, SC (Dr Stuart Thickett)
ID Code:99398
Year Published:2013
Web of Science® Times Cited:4
Deposited By:Chemistry
Deposited On:2015-03-23
Last Modified:2017-10-24
Downloads:0

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