Abstract
The mechanical properties of an alkyd resin filled with zinc oxide pigment were studied at different concentrations over a wide range of time scales using dynamic mechanical analysis, quartz crystal rheometry and nanoindentation. The motivation for this work stems from the interest in accessing the long-term properties of paint coatings by studying the mechanical properties of historic paints. In this foundational work, we compare three different modalities of mechanical measurements and systematically determine the effect of pigment filler loading on the measured properties. Quantitative agreement between the methods is obtained when the characteristic time scales of each of the methods is taken into account. While nanoindentation is the technique most readily applied to historic paint samples, the rheometric quartz crystal microbalance (rheo-QCM) is the best suited for obtaining mechanistic information from measurements of paint properties over time, provided that appropriate thin-film samples can be produced. In these studies we find that ZnO increases the rate of oxidation of the alkyd during the initial stages of cure by an amount that depends on the ZnO content.
| Original language | English (US) |
|---|---|
| Article number | 122222 |
| Journal | Polymer |
| Volume | 191 |
| DOIs | |
| State | Published - Mar 16 2020 |
Funding
This material is based upon work supported by the National Science Foundation, USA through the Division of Materials Research ( DMR-1241667 ), the Office of International Science and Engineering, USA ( OISE-1743748 ) and the Graduate Research Fellowship program, USA ( DGE-1324585 ). The Andrew W. Mellon Foundation and the Grainger Foundation are thanked for their support of scientific research at the Art Institute of Chicago. This work made use of the EPIC and SPID facilities of the NUANCE Center at Northwestern University, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource, USA ( NSF NNCI-1542205 ); the MRSEC, USA program ( NSF DMR-1121262 ) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. This material is based upon work supported by the National Science Foundation, USA through the Division of Materials Research (DMR-1241667), the Office of International Science and Engineering, USA (OISE-1743748) and the Graduate Research Fellowship program, USA (DGE-1324585). The Andrew W. Mellon Foundation and the Grainger Foundation are thanked for their support of scientific research at the Art Institute of Chicago. This work made use of the EPIC and SPID facilities of the NUANCE Center at Northwestern University, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource, USA (NSF NNCI-1542205); the MRSEC, USA program (NSF DMR-1121262) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN.
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry