Abstract Conservators and restorers often encounter pressure sensitive adhesive tapes used for conservation reasons. This type of tape has been used to repair documents or pages of books or on torn documents. The adhesives frequently found are composed of either natural or synthetic rubber or of acrylics. The pressure sensitive adhesive tapes (PSTs) consist of four layers: the release coating, the backing, the primer and the adhesive. The restoration often requires the removal of the adhesive or backing or any other of the PST layers affecting paper artworks since degradation products could originate from one or more of these layers. In this work, six pressure sensitive adhesive tapes often found on paper works of art were analysed with Py-GC–MS in order to obtain a chemical classification of the PSTs as a whole, as well as, for the first time, of the single layers. The pyrolytic products detected allowed to recognize two main classes of adhesives: acrylic and styrene block copolymers. Among acrylic types, different copolymers, such as poly(n-butyl acrylate - methyl methacrylate - 2-ethylhexyl acrylate), poly(n-butyl acrylate - methyl methacrylate) and poly(n-butyl acrylate - ethyl acrylate) have been used often together with phthalate and adipate plasticizers. On the other hand, the styrene-isoprene-styrene and the styrene-butadiene-styrene copolymers were identified for styrene block type. In these adhesives, more terpenoid tackifiers have been revealed. In the backing layers the pyrolyzates suggested the use of polypropylene, cellulose acetate, paper or polyvinyl chloride. Only for one sample, the insulating tape, it was possible to detach the release coating from the backing layer and so to identify its acrylic nature. The exact knowledge of different layers of PSTs could help restorers to select an optimal removal procedure.

中文翻译：

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热解气相色谱 - 压敏胶带的质谱分析

摘要 保护人员和修复人员经常会遇到出于保护原因使用的压敏胶带。这种类型的胶带已用于修复文档或书页或撕裂的文档。经常发现的粘合剂由天然或合成橡胶或丙烯酸树脂组成。压敏胶带 (PST) 由四层组成：隔离涂层、背衬、底漆和粘合剂。修复通常需要去除粘合剂或背衬或任何其他影响纸张艺术品的 PST 层，因为降解产物可能来自这些层中的一个或多个。在这项工作中，使用 Py-GC-MS 分析了常见于纸质艺术品上的六种压敏胶带，以获得整个 PST 的化学分类，以及第一次，的单层。检测到的热解产物允许识别两大类粘合剂：丙烯酸和苯乙烯嵌段共聚物。在丙烯酸​​类中，经常使用不同的共聚物，例如聚（丙烯酸正丁酯-甲基丙烯酸甲酯-丙烯酸2-乙基己酯）、聚（丙烯酸正丁酯-甲基丙烯酸甲酯）和聚（丙烯酸正丁酯-丙烯酸乙酯）与邻苯二甲酸酯和己二酸酯增塑剂一起使用。另一方面，苯乙烯-异戊二烯-苯乙烯和苯乙烯-丁二烯-苯乙烯共聚物被确定为苯乙烯嵌段类型。在这些粘合剂中，已经揭示了更多的萜类增粘剂。在背衬层中，热解物建议使用聚丙烯、醋酸纤维素、纸或聚氯乙烯。只为一个样品，绝缘胶带，可以将隔离涂层从背衬层上分离，从而确定其丙烯酸性质。PST 不同层的确切知识可以帮助恢复者选择最佳的去除程序。