Anti-cancer Schiff bases as photostabilizer for poly(vinyl chloride)

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-11-29 DOI:10.4314/bcse.v38i1.11

Mohammed Alwan Farhan, Wassan Baqir Ali, Wijdan Amer Ibrahim, Zaid H. Mahmoud

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Abstract

To prevent or reduce the drawback effect and prolong the life of PVC and preserve its composition and efficiency, compounds are incorporated with PVC. In this work, three highly aromatic anti-cancer Schiff base compounds in symbol (C2, C3 and C5) were applied to photostabilize of PVC against photodegradation, by added it to the polymer in the form of Schiff bases, to increase the stability of polymer when irradiated with ultraviolet (UV) light, (λmax = 365 nm) at 30 ºC, with the intensity of the light wavelength at 1920 lux for a long duration. The PVC was blended with Schiff's base in concentration (0.5 %wt.), with thickness films (40 μm) were made from the blended materials. Several methods were used, including infrared spectroscopy, surface examination of irradiated films to know the effect of additives on PVC photostabilization and conductivity of films were measured by LCR meter. The results showed that the additives significantly reduced the photodegradation of PVC. C2 compound as additive, stabilize PVC more than other additives, it can absorb harmful radiation, deactivate hydrogen chloride, and scavenge high-energy species such as peroxides. Several mechanisms of photostabilization for C2 compound have been suggested. Therefore it is acting as stabilizers for PVC. KEY WORDS: PVC, Photostabilizer, UV radiation, AFM, FESEM, LCR-meter Bull. Chem. Soc. Ethiop. 2024, 38(1), 135-146. DOI: https://dx.doi.org/10.4314/bcse.v38i1.11

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作为聚氯乙烯光稳定剂的抗癌希夫碱

为了防止或减少缺点效应，延长聚氯乙烯的使用寿命，并保持其成分和效率，人们将化合物与聚氯乙烯结合在一起。在这项研究中，三种高度芳香的抗癌希夫碱化合物（符号为 C2、C3 和 C5）以希夫碱的形式添加到聚氯乙烯中，以增加聚氯乙烯在 30 ºC 紫外线（λmax = 365 nm）照射下的光稳定性，防止光降解。将聚氯乙烯与浓度为 0.5 %wt. 的希夫碱混合，用混合材料制成厚度为 40 μm 的薄膜。研究采用了多种方法，包括红外光谱分析、辐照薄膜表面检测，以了解添加剂对聚氯乙烯光稳定性的影响，并用 LCR 仪测量了薄膜的电导率。结果表明，添加剂能显著减少 PVC 的光降解。作为添加剂的 C2 化合物比其他添加剂更能稳定聚氯乙烯，它能吸收有害辐射，使氯化氢失活，并清除过氧化物等高能物种。C2 化合物的光稳定作用有多种机理。因此，它可作为 PVC 的稳定剂。关键字：PVC、光稳定剂、紫外线辐射、原子力显微镜、可见光显微镜、LCR 计 Bull.埃塞俄比亚化学学会Soc.2024, 38(1), 135-146.DOI: https://dx.doi.org/10.4314/bcse.v38i1.11

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来源期刊

Bulletin of the Chemical Society of Ethiopia 化学-化学综合

CiteScore

2.20

自引率

8.30%

发文量

113

审稿时长

6-12 weeks

期刊介绍： The Bulletin of the Chemical Society of Ethiopia (BCSE) is a triannual publication of the Chemical Society of Ethiopia. The BCSE is an open access and peer reviewed journal. The BCSE invites contributions in any field of basic and applied chemistry.