基于糖精金属离子配合物的聚甲基丙烯酸甲酯光稳定性能研究

Noor Sabah Al-Obaidi, Ahmed A. Ahmed, Ahmed N. Abd
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引用次数: 0

摘要

研究了具有Zn(II)、Cd(II)、Hg(II)、Fe(III)、Ni(II)和Cu(II)糖精配合物的聚甲基丙烯酸甲酯(PMMA)薄膜的光稳定性。采用四氢呋喃(THF)浇铸法制备了含此类配合物(重量比0.5%)的PMMA薄膜。通过监测羰基和羟基指数随辐照时间的变化,测定了化合物的光稳定活性。用紫外光谱法评价PMMA的稳定效率,研究糖苷配合物存在和不存在情况下PMMA薄膜的光分解速率常数(kd)。考察了PMMA的黏度、平均分子量随辐照时间的变化。添加剂存在下PMMA的光稳定速率依次为Ni(囊)> Cu(囊)>Zn(囊)> Cd(囊)> Hg(囊)> Fe(囊)。这取决于添加剂的结构,如过氧化分解剂、紫外线吸收剂或光稳定剂的自由基清除剂。关键词:光降解,UV稳定剂,PMMA,糖精
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Photo Stabilizing Efficiency Of Poly(methyl methacrylate) Based On Metal Ion Complexes Of Saccharine
The photostabilization of poly(methyl methacrylate) (PMMA) films having saccharine complexes of Zn(II), Cd(II), Hg(II), Fe(III), Ni(II) and Cu(II) complexes was investigated. The production of PMMA films containing such complexes (0.5% by weight) was carried out by the casting method using THF. The photostabilization activities of the compounds were determined by monitoring the carbonyl and hydroxyl index with irradiation time. Evaluation of stabilizing efficiency of PMMA by ultra-violet spectroscopy to investigate photodecomposition rate constant (kd) for PMMA films in the absence and presence of saccharine complexes. The changes in the viscosity average molecular weight of PMMA with irradiation time were evaluated. The rate of photostabilization for PMMA in the presence of the additives was found to follow the order Ni(sac) > Cu(sac) > Zn(sac) > Cd(sac) > Hg(sac) > Fe(sac). Depending on the structure of the additive, such as a peroxide decomposer, UV absorption or a radical scavenger for the photostabilizer. Keywords: Photodegradation, UV stabilizers, PMMA, Saccharine.
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