Modification of poly(vinyl chloride) by mefenamic acid in presence of micro metallic oxides as self photostabilizer

To date, many approaches have been made to stabilize the chemical structure of PVC when exposed to sunlight in outdoor usage. This work includes utilizing mefenamic acid (1 % per polymer weight) as a new photo stabilizer unit to adjust PVC to enhance resistance to change under UV exposure. Modificat...

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Main Authors: Mohammed H. Al-Mashhadani, Dhuha H. Fadhil, Ahmed A. Ahmed, Amani A. Husain, Hassan Hashim, Emad Yousif, Muna Bufaroosha
Format: Article
Language:English
Published: KeAi Communications Co., Ltd. 2023-01-01
Series:Materials Science for Energy Technologies
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S258929912300006X
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author Mohammed H. Al-Mashhadani
Dhuha H. Fadhil
Ahmed A. Ahmed
Amani A. Husain
Hassan Hashim
Emad Yousif
Muna Bufaroosha
author_facet Mohammed H. Al-Mashhadani
Dhuha H. Fadhil
Ahmed A. Ahmed
Amani A. Husain
Hassan Hashim
Emad Yousif
Muna Bufaroosha
author_sort Mohammed H. Al-Mashhadani
collection DOAJ
description To date, many approaches have been made to stabilize the chemical structure of PVC when exposed to sunlight in outdoor usage. This work includes utilizing mefenamic acid (1 % per polymer weight) as a new photo stabilizer unit to adjust PVC to enhance resistance to change under UV exposure. Modification by attaching a new unit that contains an aromatic substance could protect the polymer from UV light due to its ability to absorb it. Positive results were obtained, as the interaction between mefenamic acid and PVC succeeded, using the FTIR technique to characterize the chemical structure of the product. FTIR spectrum of modified PVC shows the disappearance of (OH) band in the region above 3200 cm−1 which is clear evidence that the connection between the polymer and mefenamic acid has happened through the OH group. In addition, we have investigated the influence of microparticle metallic oxides such as TiO2, and Cr2O3, using only 1 % per modified polymer weight, on the photodegradation process of PVC materials. Several approaches have been utilized to investigate the photo-stability of studied materials which are FTIR functional group indices, weight-loss percentage, microscopic images, SEM, and AFM. They demonstrated that modified PVC gives better stability after exposure to UV in comparison to unmodified PVC. It's interesting to note that adding titanium dioxide to modified PVC has increased the amount of UV protection by acting as a UV shielding agent and blocking the light's path to the polymer. Thus, chromium oxide has demonstrated the opposite findings because it functions as a photo-catalytic reagent that accelerated the photo-degradation process. This result may be interpreted as the decomposition of waste PVC, which poses a major threat to the marine ecosystem.
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spelling doaj.art-f63f7a5fe064499b8cb14dea336843432023-03-07T04:06:26ZengKeAi Communications Co., Ltd.Materials Science for Energy Technologies2589-29912023-01-016318330Modification of poly(vinyl chloride) by mefenamic acid in presence of micro metallic oxides as self photostabilizerMohammed H. Al-Mashhadani0Dhuha H. Fadhil1Ahmed A. Ahmed2Amani A. Husain3Hassan Hashim4Emad Yousif5Muna Bufaroosha6Department of Chemistry, College of Science, Al-Nahrain University, P. O. Box: 64021, Baghdad, IraqDepartment of Chemistry, College of Science, Al-Nahrain University, P. O. Box: 64021, Baghdad, IraqDepartment of Chemistry, College of Science, Al-Nahrain University, P. O. Box: 64021, Baghdad, IraqPolymer Research Unit, College of Science, Al-Mustansiriyah University, 10052 Baghdad, IraqDepartment of Physics, College of Science, Al-Nahrain University, Baghdad 64021, IraqDepartment of Chemistry, College of Science, Al-Nahrain University, P. O. Box: 64021, Baghdad, IraqDepartment of Chemistry, College of Science, UAE University, Al-Ain, United Arab Emirates; Corresponding author.To date, many approaches have been made to stabilize the chemical structure of PVC when exposed to sunlight in outdoor usage. This work includes utilizing mefenamic acid (1 % per polymer weight) as a new photo stabilizer unit to adjust PVC to enhance resistance to change under UV exposure. Modification by attaching a new unit that contains an aromatic substance could protect the polymer from UV light due to its ability to absorb it. Positive results were obtained, as the interaction between mefenamic acid and PVC succeeded, using the FTIR technique to characterize the chemical structure of the product. FTIR spectrum of modified PVC shows the disappearance of (OH) band in the region above 3200 cm−1 which is clear evidence that the connection between the polymer and mefenamic acid has happened through the OH group. In addition, we have investigated the influence of microparticle metallic oxides such as TiO2, and Cr2O3, using only 1 % per modified polymer weight, on the photodegradation process of PVC materials. Several approaches have been utilized to investigate the photo-stability of studied materials which are FTIR functional group indices, weight-loss percentage, microscopic images, SEM, and AFM. They demonstrated that modified PVC gives better stability after exposure to UV in comparison to unmodified PVC. It's interesting to note that adding titanium dioxide to modified PVC has increased the amount of UV protection by acting as a UV shielding agent and blocking the light's path to the polymer. Thus, chromium oxide has demonstrated the opposite findings because it functions as a photo-catalytic reagent that accelerated the photo-degradation process. This result may be interpreted as the decomposition of waste PVC, which poses a major threat to the marine ecosystem.http://www.sciencedirect.com/science/article/pii/S258929912300006XUV-absorberMefenamic acidPVCPhotodegradationTiO2Alkene group indices
spellingShingle Mohammed H. Al-Mashhadani
Dhuha H. Fadhil
Ahmed A. Ahmed
Amani A. Husain
Hassan Hashim
Emad Yousif
Muna Bufaroosha
Modification of poly(vinyl chloride) by mefenamic acid in presence of micro metallic oxides as self photostabilizer
Materials Science for Energy Technologies
UV-absorber
Mefenamic acid
PVC
Photodegradation
TiO2
Alkene group indices
title Modification of poly(vinyl chloride) by mefenamic acid in presence of micro metallic oxides as self photostabilizer
title_full Modification of poly(vinyl chloride) by mefenamic acid in presence of micro metallic oxides as self photostabilizer
title_fullStr Modification of poly(vinyl chloride) by mefenamic acid in presence of micro metallic oxides as self photostabilizer
title_full_unstemmed Modification of poly(vinyl chloride) by mefenamic acid in presence of micro metallic oxides as self photostabilizer
title_short Modification of poly(vinyl chloride) by mefenamic acid in presence of micro metallic oxides as self photostabilizer
title_sort modification of poly vinyl chloride by mefenamic acid in presence of micro metallic oxides as self photostabilizer
topic UV-absorber
Mefenamic acid
PVC
Photodegradation
TiO2
Alkene group indices
url http://www.sciencedirect.com/science/article/pii/S258929912300006X
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