Synthesis of Methyldopa–Tin Complexes and Their Applicability as Photostabilizers for the Protection of Polyvinyl Chloride against Photolysis
Polyvinyl chloride (PVC) is a ubiquitous thermoplastic that is produced on an enormous industrial scale to meet growing global demand. PVC has many favorable properties and is used in various applications. However, photodecomposition occurs when harsh conditions, such as high temperatures in the pre...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/21/4590 |
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| author | Noor Naoom Emad Yousif Dina S. Ahmed Benson M. Kariuki Gamal A. El-Hiti |
| author_facet | Noor Naoom Emad Yousif Dina S. Ahmed Benson M. Kariuki Gamal A. El-Hiti |
| author_sort | Noor Naoom |
| collection | DOAJ |
| description | Polyvinyl chloride (PVC) is a ubiquitous thermoplastic that is produced on an enormous industrial scale to meet growing global demand. PVC has many favorable properties and is used in various applications. However, photodecomposition occurs when harsh conditions, such as high temperatures in the presence of oxygen and moisture, are encountered. Thus, PVC is blended with additives to increase its resistance to deterioration caused by exposure to ultraviolet light. In the current research, five methyldopa–tin complexes were synthesized and characterized. The methyldopa–tin complexes were mixed with PVC at a concentration of 0.5% by weight, and thin films were produced. The capability of the complexes to protect PVC from irradiation was shown by a reduction in the formation of small residues containing alcohols, ketones, and alkenes, as well as in weight loss and in the molecular weight of irradiated polymeric blends. In addition, the use of the new additives significantly reduced the roughness factor of the irradiated films. The additives containing aromatic substituents (phenyl rings) were more effective compared to those comprising aliphatic substituents (butyl and methyl groups). Methyldopa–tin complexes have the ability to absorb radiation, coordinate with polymeric chains, and act as radical, peroxide, and hydrogen chloride scavengers. |
| first_indexed | 2024-03-09T18:42:44Z |
| format | Article |
| id | doaj.art-2211bf2167d9442d96d020bd5f046dc9 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T18:42:44Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-2211bf2167d9442d96d020bd5f046dc92023-11-24T06:28:42ZengMDPI AGPolymers2073-43602022-10-011421459010.3390/polym14214590Synthesis of Methyldopa–Tin Complexes and Their Applicability as Photostabilizers for the Protection of Polyvinyl Chloride against PhotolysisNoor Naoom0Emad Yousif1Dina S. Ahmed2Benson M. Kariuki3Gamal A. El-Hiti4Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, IraqDepartment of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, IraqDepartment of Medical Instrumentation Engineering, Al-Mansour University College, Baghdad 64201, IraqSchool of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UKDepartment of Optometry, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi ArabiaPolyvinyl chloride (PVC) is a ubiquitous thermoplastic that is produced on an enormous industrial scale to meet growing global demand. PVC has many favorable properties and is used in various applications. However, photodecomposition occurs when harsh conditions, such as high temperatures in the presence of oxygen and moisture, are encountered. Thus, PVC is blended with additives to increase its resistance to deterioration caused by exposure to ultraviolet light. In the current research, five methyldopa–tin complexes were synthesized and characterized. The methyldopa–tin complexes were mixed with PVC at a concentration of 0.5% by weight, and thin films were produced. The capability of the complexes to protect PVC from irradiation was shown by a reduction in the formation of small residues containing alcohols, ketones, and alkenes, as well as in weight loss and in the molecular weight of irradiated polymeric blends. In addition, the use of the new additives significantly reduced the roughness factor of the irradiated films. The additives containing aromatic substituents (phenyl rings) were more effective compared to those comprising aliphatic substituents (butyl and methyl groups). Methyldopa–tin complexes have the ability to absorb radiation, coordinate with polymeric chains, and act as radical, peroxide, and hydrogen chloride scavengers.https://www.mdpi.com/2073-4360/14/21/4590methyldopa–tin complexesphotolysispolyvinyl chlorideweight lossmolecular weight depressionsurface morphology |
| spellingShingle | Noor Naoom Emad Yousif Dina S. Ahmed Benson M. Kariuki Gamal A. El-Hiti Synthesis of Methyldopa–Tin Complexes and Their Applicability as Photostabilizers for the Protection of Polyvinyl Chloride against Photolysis Polymers methyldopa–tin complexes photolysis polyvinyl chloride weight loss molecular weight depression surface morphology |
| title | Synthesis of Methyldopa–Tin Complexes and Their Applicability as Photostabilizers for the Protection of Polyvinyl Chloride against Photolysis |
| title_full | Synthesis of Methyldopa–Tin Complexes and Their Applicability as Photostabilizers for the Protection of Polyvinyl Chloride against Photolysis |
| title_fullStr | Synthesis of Methyldopa–Tin Complexes and Their Applicability as Photostabilizers for the Protection of Polyvinyl Chloride against Photolysis |
| title_full_unstemmed | Synthesis of Methyldopa–Tin Complexes and Their Applicability as Photostabilizers for the Protection of Polyvinyl Chloride against Photolysis |
| title_short | Synthesis of Methyldopa–Tin Complexes and Their Applicability as Photostabilizers for the Protection of Polyvinyl Chloride against Photolysis |
| title_sort | synthesis of methyldopa tin complexes and their applicability as photostabilizers for the protection of polyvinyl chloride against photolysis |
| topic | methyldopa–tin complexes photolysis polyvinyl chloride weight loss molecular weight depression surface morphology |
| url | https://www.mdpi.com/2073-4360/14/21/4590 |
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