塑性聚合物 (乙烯基) 和纤维素材料的交叉感染性降解
Simona Klempová1, Petra Urbanová1, Lucia Mencáková1
1Faculty of Chemical and Food Technology, Department of Wood, Pulp and Paper, Institute of Natural and Synthetic Polymers, Slovak University of Technology in Bratislava, Radlinského 9, 812 37, Bratislava, Slovakia.
ChemPlusChem
|July 2, 2025
概括
塑化聚乙烯 (PVC-P) 和纤维素材料通过直接接触而相互降解. 这种相互作用释放出有害的化合物,加速了PVC-P和纸制品的恶化.
科学领域:
- 遗产科学科学 遗产科学
- 材料科学 材料科学 材料科学
- 化学 化学 化学
背景情况:
- 塑化聚乙烯 (PVC-P) 释放有害物质,如盐酸 (HCl) 和塑化剂.
- 之前的研究重点是PVC-P排放对纤维素的影响,而不是直接接触的相互作用.
- 文化遗产机构面临着影响保存文物的PVC-P降解的风险.
研究的目的:
- 为了研究PVC-P与纤维素材料在直接接触下的交叉降解.
- 分析纯纤维素纸和含有酸性素的纸对PVC-P的影响.
- 了解这种相互作用的降解机制和后果.
主要方法:
- 在90°C时与Whatman (纯纤维素) 和NOVO (酸性纸) 直接接触的PVC-P加速老化.
- 来自PVC-P的增塑剂和热稳定剂迁移的分析.
- 监测PVC-P中脱化及其对纤维素脱聚合和表面pH的影响.
主要成果:
- 直接接触诱导的可塑化剂和热稳定剂从PVC-P迁移.
- PVC-P脱化加速了纤维素的脱聚合,降低了表面的pH值.
- 纤维素材料破坏了PVC-P的稳定性,同时也经历了降解.
- 不同质的纤维素材料导致PVC-P降解不均.
结论:
- 纤维素材料和PVC-P在直接接触时发生相互破坏的相互作用.
- 降解过程涉及化学交换,加速了这两种材料的恶化.
- 了解这种相互作用对于保护受PVC-P影响的文化遗产文物至关重要.
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