对乐高®进行热分析研究,用于研究ABS的光稳定性
Francesca Sabatini1, Silvia Pizzimenti2, Irene Bargagli1
1Institute of Chemical Science and Technologies "G. Natta" (CNR-SCITEC), Via Elce di Sotto 8, 01628 Perugia, Italy.
Polymers
|August 12, 2023
概括
研究人员使用乐高研究了烯酸丁 (ABS) 的光降解. 他们确定了ABS降解的分子标记物,有助于监测塑料艺术品和博物馆物品.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 分析化学 分析化学
背景情况:
- 烯乙 (ABS) 是一种多功能热塑性聚合物,在消费品,设计和当代艺术中普遍存在.
- 了解ABS的光降解对于保存塑料制品和艺术品至关重要.
- 由于其广泛的识别和使用,乐高可以作为研究ABS属性的模型系统.
研究的目的:
- 为了研究ABS的化学和热性能.
- 分析ABS在UV-V加速衰老下的光降解过程.
- 建立一个多分析方法来监测ABS降解和保护状况.
主要方法:
- 使用了结合热,质谱和光谱技术的多分析方法.
- 采用热解气体染色学质谱学 (Py-GC-MS),进化气体分析质谱学 (EGA-MS),差分扫描热度计 (DSC),热重力测量分析 (TGA) 和外部反射里埃变换红外 (FT-IR) 光谱学.
- 将乐高置于加速的UV-Vis光氧化老化中,以模拟环境暴露.
主要成果:
- 确定未老化的乐高的组成和热稳定性.
- 鉴定了聚乙烯氧化和 styrene-acrylonitrile 脱聚合的分子标记物,为两步 ABS 降解途径提供了新的证据.
- 证明了批量分析数据与用于现场监测的非侵入性FT-IR光谱学之间的相关性.
结论:
- 这项研究阐明了ABS复杂的光降解机制.
- 建立了特定的分子标记,以跟踪ABS降解.
- 验证了FT-IR光谱作为一种便携式,非侵入性工具,用于评估博物馆环境中的塑料物品的保存状态.
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