Denture adhesives are designed to be moisture-sensitive through the inclusion of a blend of polymer salts with varying degrees of water-sensitivity. This enables the adhesive to mix with saliva in vivo and activate its high tack, through the formation of a mucilaginous layer. We report for the first time, the use of differential scanning calorimetry (DSC) to study a series of hydrophobic and hydrophilic polymeric systems in order to correlate water-structuring behavior with adhesion strength. Adhesive bonding of the more hydrophobic variants was higher than that of a commercial-based control and a more hydrophilic polymer system in both lap shear and tensile configurations. Water-binding data suggested that increasing the hydrophobicity of the maleic acid copolymer substituents led to decreased levels of freezing water. In comparison, increasing the hydrophilic nature of the polymer backbone gave higher levels of freezing water within the hydrated samples. The results of this study emphasize the importance of varying the levels of hydrophobic and hydrophilic components within denture adhesive formulations, alongside the types of water present within the adhesive systems. This phenomenon has shown the potential to fine-tune the adhesive properties and failure mode against poly(methyl methacrylate), PMMA, surfaces.
Bibliographical noteCopyright © 2018 by John Wiley & Sons. This is the peer reviewed version of the following article: Hydrophobic and Hydrophilic Effects on Water Structuring and Adhesion in Denture AdhesivesGill, S. K., Roohpour, N., An, Y., Gautrot, J. E., Topham, P. D. & Tighe, B. J. 13 Jan 2018 In : Journal of Biomedical Materials Research: Part A.Research output: Contribution to journal › Article, which has been published in final form at http://doi.org/10.1002/jbm.a.36341. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Funding: BBSRC and GSK under the Industrial CASE Studentship Scheme (grant number – BB/L502200/1)
- differential scanning calorimetry
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