Issue 6, 2011

Synthesis and application of new CO2-soluble vinyl pivalate hydrocarbon stabilisers viaRAFT polymerisation

Abstract

We describe the synthesis of novel, highly CO2-soluble stabilisers that overcome the current limitation requiring use of fluorinated or siloxane based materials for synthesis and processing. A series of homopolymers and copolymers with targeted molecular weight (∼10 kg mol−1) of vinyl pivalate and vinyl acetate were prepared by xanthate mediated RAFT polymerisation and a range of comonomer ratios have been characterised by GPC, NMR and DSC. In addition, detailed phase behaviour studies using a variable volume view cell were used to determine the relative solubility in scCO2. The stabilisers were applied to scCO2 dispersion polymerisations to determine their efficacy and SEM was primarily used to gauge the stabiliser effect upon the microparticle morphology of the polymer product.

Graphical abstract: Synthesis and application of new CO2-soluble vinyl pivalate hydrocarbon stabilisers viaRAFT polymerisation

Supplementary files

Article information

Article type
Paper
Submitted
04 Feb 2011
Accepted
13 Mar 2011
First published
20 Apr 2011

Polym. Chem., 2011,2, 1293-1299

Synthesis and application of new CO2-soluble vinyl pivalate hydrocarbon stabilisers viaRAFT polymerisation

N. A. Birkin, N. J. Arrowsmith, E. J. Park, A. P. Richez and S. M. Howdle, Polym. Chem., 2011, 2, 1293 DOI: 10.1039/C1PY00062D

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