A variety of adhesives are used for the conservation of paintings. These materials include natural adhesives such as animal glues, waxes, and gums which may chemically degrade over time resulting in unwanted discoloration and mechanical failure. Synthetic adhesives have been introduced to address these concerns. However, most consolidating adhesives have not been specifically formulated and tested to meet the high demands of conservation, ultimately resulting in undesirable physical and mechanical properties. Additionally, some synthetic adhesives are less stable and may cross-link making it difficult to remove years after application. This paper investigates the photo-stability of commercially available tri-block acrylic copolymers (PMMA-PnBA-PMMA) to assess their potential long-term serviceability as consolidants for flaking paint. These copolymers were combined with synthetic low molecular weight resins to reduce viscosity of the adhesive and provide tack. The polymer blends underwent accelerated aging under simulated indoor conditions. Blends were analysed for degradation using Fourier-transform infrared spectroscopy and size exclusion chromatography. Upon irradiation, acrylic copolymers (PMMA-PnBA-PMMA) undergo shifts to higher and lower molecular weight, suggesting that degradation occurs by polymer cross-linking and chain scission. Furthermore, the acrylic copolymer degradation rate was influenced by the type of low molecular weight resin. However, with the addition of a hindered amine light stabilizer these blends exhibited minimal changes in molecular weight. Lastly, the peel strength of the blends were investigated and shown to have comparable peel strength to a popular commercial material, Paraloid™ B-72, often used in consolidation thus showing their promise for use within cultural heritage.

各种胶粘剂用于绘画保护。这些材料包括天然粘合剂，例如动物胶，蜡和树胶，它们会随着时间的流逝而发生化学降解，从而导致不希望的变色和机械故障。已经引入合成粘合剂来解决这些问题。但是，大多数固结胶粘剂尚未经过专门配制和测试以满足对养护的高要求，最终导致不良的物理和机械性能。此外，某些合成胶粘剂的稳定性较差，并且可能会发生交联，使得在使用数年后难以去除。本文研究了市售三嵌段丙烯酸共聚物（PMMA-PnBA-PMMA）的光稳定性，以评估其作为片状涂料的固结剂的长期长期使用性。这些共聚物与合成的低分子量树脂组合以降低粘合剂的粘度并提供粘性。聚合物共混物在模拟室内条件下经历加速老化。使用傅立叶变换红外光谱法和尺寸排阻色谱法分析共混物的降解。辐射后，丙烯酸共聚物（PMMA-PnBA-PMMA）转变为更高和更低的分子量，这表明降解是通过聚合物交联和断链而发生的。此外，丙烯酸共聚物的降解速率受低分子量树脂类型的影响。但是，加入受阻胺光稳定剂后，这些共混物的分子量变化很小。最后，