Evaluation of polymers for conservation treatments of outdoor exposed stone monuments. Part I: Photo-oxidative weathering

被引：187

作者：

Favaro, M.

Mendichi, R.

Ossola, F.

Russo, U.

Simon, S.

Tomasin, P.

Vigato, P. A.

机构：

[1] CNR, Ist Chim Inorgan & Superfici, Area Ricerca, I-35127 Padua, Italy

[2] CNR, Ist Studio Macromol, I-20133 Milan, Italy

[3] Univ Padua, Dipartimento Chim, I-35131 Padua, Italy

[4] Rathgen Forschungslabor Staatl Museen Berlin, D-14059 Berlin, Germany

来源：

POLYMER DEGRADATION AND STABILITY | 2006年 / 91卷 / 12期

关键词：

acrylic polymers; silicones; photo-oxidative ageing; stone conservation; polymer removability;

D O I：

10.1016/j.polymdegradstab.2006.08.012

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The commercial acrylic polymers, Paraloid B72 and Paraloid B67, and a silicon-based product, Dri-Film 104, commonly used as water repellents/consolidants in the restoration of stone artefacts, have been tested to evaluate their performances when submitted to ageing, simulating the outdoor conditions of treated stone. After full characterization, the three polymers were applied as thin films on slides, as thick film on petri dishes and on marble by brush or by imbibition and the resulting samples were submitted to photo-oxidative weathering (lambda = 340 nm). The weathering evolution was checked by ultrasonic and colorimetric measurements and by FT-IR, NMR and SEC determinations. Removability tests were also performed. All the polymers underwent irreversible modifications with reduction of their conservative properties, colour change and, above all, impossibility of their complete removal. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：3083 / 3096

页数：14

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