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https://hdl.handle.net/1959.11/3652
Title: | Measurement of transfer coefficients to monomer for n-butyl methacrylate by molecular weight distributions from emulsion polymerization | Contributor(s): | Sangster, David F (author); Feldthusen, Jesper (author); Strauch, Jelica (author); Fellows, Christopher (author) | Publication Date: | 2008 | DOI: | 10.1002/macp.200800059 | Handle Link: | https://hdl.handle.net/1959.11/3652 | Abstract: | The average kinetic coefficient for chain transfer to monomer (ktr,M) in the free-radical polymerization of n-butyl methacrylate (BMA) has been determined by the analysis of molecular weight distributions obtained by seeded emulsion polymerization under conditions such that chain transfer to monomer is the dominant chain-stopping event. Measurements between 40 and 70°C gave data fitting an Arrhenius-type relationship with exponential factor factor EA=30900±4500 J-mol⁻¹ and pre-exponential factor log A=3.45±0.15. The value for EA is comparable with published data for chain transfer to monomer from methyl methacrylate (MMA) and n-butyl acrylate (BA). The A value, however, is 1-3 orders of magnitude smaller, suggesting that there is more hindrance for chain transfer to monomer for BMA than for either MMA or BA. | Publication Type: | Journal Article | Source of Publication: | Macromolecular Chemistry and Physics, 209(15), p. 1612-1627 | Publisher: | Wiley-VCH Verlag GmbH & Co KGaA | Place of Publication: | Germany | ISSN: | 1521-3935 1022-1352 |
Fields of Research (FoR) 2008: | 030305 Polymerisation Mechanisms | Socio-Economic Objective (SEO) 2008: | 860606 Plastics in Primary Forms 970103 Expanding Knowledge in the Chemical Sciences |
Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article |
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