Determination of neutralization capacity and stability of a basic methacrylate monomer using NMR
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2012Article Version
Scholarly/refereed, author accepted manuscript
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The durability of dental resin depends on the stability of the polymer. The neutralizing capacity of a basic methacrylate monomer and its chemical stability were measured using nuclear magnetic resonance (NMR) spectroscopy. Lactic acid solution was titrated with 2-(dimethylamino)ethylmethacrylate (DMAEMA) or 2-hydroxyethylmethacrylate (HEMA) and its chemical shifts monitored. Addition of DMAEMA alters the chemical shift proportionally to pH neutralization, whereas HEMA has no impact. Chemical shifts were used to quantify both the change in pH and monomer stability. The results demonstrate that neutralization by basic monomer can be achieved and that this can be measured using an NMR assay.
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This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Polymeric Materials and Polymeric Biomaterials in 2012, available online: http://www.tandfonline.com/10.1080/00914037.2011.574660.
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Park, J., Ye, Q., Spencer, P., & Laurence, J. S. (2012). Determination of neutralization capacity and stability of a basic methacrylate monomer using NMR. International Journal of Polymeric Materials, 61(2), 144–153. http://doi.org/10.1080/00914037.2011.574660
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