Ageing of vinyl emulsion paints - an atomic force microscopy study

作者：de Sa M H^*; Eaton Peter; Ferreira Joana L; Melo M J; Ramos Ana M

来源：Surface and Interface Analysis, 2011, 43(8): 1160-1164.

DOI：10.1002/sia.3664

• AFM
• paint
• vinyl films
• PVAc
• degradation
• photostability

This paper presents a morphological study of poly(vinyl acetate) (PVAc) based films, either cast from polymer solutions or aqueous emulsions, which are widely used in modern and contemporary art, namely as binding media. Different vinyl films were prepared: single polymer, unpigmented and TiO(2)-pigmented emulsion films, and subjected to accelerated light ageing. The evaluation of the surface changes of these films, over 3500 hours irradiation under a Xenon lamp (lambda >= 300 nm), was characterized by atomic force microscopy (AFM). The samples studied have suffered minor surface changes and revealed pronounced photostability. The AFM results obtained indicate that the most relevant morphological changes that occurred over time were primarily related to the exudation of surfactants, present in the vinyl emulsions.

• 出版日期2011-8