1
|
Evaluation of poly(N-benzoyl-4-(N-itaconimido)benzhydrazide) and its metal complexes as microbial inhibitors and thermal stabilizers for poly(vinyl chloride). Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03950-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
2
|
Abdel-Naby AS, Al-Ghamdi AA. Effect of crystallinity on the thermal and photo-stabilization of PVC/poly (AN-DAA) blend. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2020. [DOI: 10.1080/1023666x.2020.1737466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Abir. S. Abdel-Naby
- Department of Chemistry, College of Science, Imam Abdul Rahman Bin Faisal University, Dammam, Saudi Arabia
| | - Azza A. Al-Ghamdi
- Department of Chemistry, College of Science, Imam Abdul Rahman Bin Faisal University, Dammam, Saudi Arabia
| |
Collapse
|
3
|
Evaluation of the thermal stabilization behavior of hydrotalcite against organic stabilizers for plasticized PVC films. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02977-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
4
|
Mohamed NA. Antimicrobial itaconimido aromatic hydrazide derivatives for inhibition of the thermal degradation of rigid PVC. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2486-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
5
|
Mohamed NA. Thermogravimetric evaluation of novel antimicrobial phthalimido aromatic 1,3,4-oxadiazole derivatives as stabilizers for rigid PVC. Polym Degrad Stab 2017. [DOI: 10.1016/j.polymdegradstab.2017.09.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
6
|
Ahmed DS, El-Hiti GA, Hameed AS, Yousif E, Ahmed A. New Tetra-Schiff Bases as Efficient Photostabilizers for Poly(vinyl chloride). Molecules 2017; 22:E1506. [PMID: 28891944 PMCID: PMC6151724 DOI: 10.3390/molecules22091506] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 09/05/2017] [Accepted: 09/06/2017] [Indexed: 11/16/2022] Open
Abstract
Three new tetra-Schiff bases were synthesized and characterized to be used as photostabilizers for poly(vinyl chloride) (PVC) films. The photostability of PVC films (40 μm thickness) in the presence of Schiff bases (0.5 wt %) upon irradiation (300 h) with a UV light (λmax = 365 nm and light intensity = 6.43 × 10-9 ein∙dm-3∙s-1) was examined using various spectroscopic measurements and surface morphology analysis. The changes in various functional groups' indices, weight and viscosity average molecular weight of PVC films were monitored against irradiation time. The additives used showed photostability for PVC films, with Schiff base 1 being the most effective additive upon irradiation, followed by 2 and 3. The atomic force microscopy (AFM) images for the PVC surface containing Schiff base 1 after irradiation were found to be smooth, with a roughness factor (Rq) of 36.8, compared to 132.2 for the PVC (blank). Several possible mechanisms that explain PVC photostabilization upon irradiation in the presence of tetra-Schiff bases were proposed.
Collapse
Affiliation(s)
- Dina S Ahmed
- Department of Chemistry, College of Science, Tikrit University, Tikrit 34001, Iraq.
| | - Gamal A El-Hiti
- Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia.
| | - Ayad S Hameed
- Department of Chemistry, College of Science, Tikrit University, Tikrit 34001, Iraq.
| | - Emad Yousif
- Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, Iraq.
| | - Ahmed Ahmed
- Polymer Research Unit, College of Science, Al-Mustansiriyah University, Baghdad 10052, Iraq.
| |
Collapse
|
7
|
Mohamed NA, Abd El-Ghany NA, Fahmy MM, Khalaf-Alla PA. Novel polymaleimide containing dibenzoyl hydrazine pendant group as chelating agent for antimicrobial activity. INT J POLYM MATER PO 2017. [DOI: 10.1080/00914037.2017.1297944] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Nadia A. Mohamed
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
| | | | - Mona M. Fahmy
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
| | | |
Collapse
|
8
|
Mohamed NA, Abd El-Ghany NA. Evaluation of the stability of rigid poly(vinyl chloride)/biologically active phthalimido phenyl urea composites using thermogravimetric analysis. Polym Degrad Stab 2017. [DOI: 10.1016/j.polymdegradstab.2017.04.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
9
|
Mohamed NA, Abd El-Ghany NA, Fahmy MM, Ahmed MH. Thermally stable antimicrobial polyvinylchloride/maleimido aromatic hydrazide composites. JOURNAL OF VINYL AND ADDITIVE TECHNOLOGY 2016; 22:247-258. [DOI: 10.1002/vnl.21444] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Affiliation(s)
- Nadia A. Mohamed
- Department of Chemistry; Faculty of Science, Cairo University; Giza 12613 Egypt
| | | | - Mona M. Fahmy
- Department of Chemistry; Faculty of Science, Cairo University; Giza 12613 Egypt
| | - Marwa H. Ahmed
- Department of Chemistry; Faculty of Science, Cairo University; Giza 12613 Egypt
| |
Collapse
|
10
|
Ali MM, El-Hiti GA, Yousif E. Photostabilizing Efficiency of Poly(vinyl chloride) in the Presence of Organotin(IV) Complexes as Photostabilizers. Molecules 2016; 21:E1151. [PMID: 27589707 PMCID: PMC6274560 DOI: 10.3390/molecules21091151] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 08/24/2016] [Accepted: 08/25/2016] [Indexed: 11/19/2022] Open
Abstract
Three organotin complexes containing furosemide as a ligand (L), Ph₃SnL, Me₂SnL₂ and Bu₂SnL₂, were synthesized and characterized. Octahedral geometry was proposed for the Me₂SnL₂ and Bu₂SnL₂, while the Ph₃SnL complex has trigonal bipyramid geometry. The synthesized organotin complexes (0.5% by weight) were used as additives to improve the photostability of poly(vinyl chloride), PVC, (40 μm thickness) upon irradiation. The changes imposed on functional groups, weight loss and viscosity average molecular weight of PVC films were monitored. The experimental results show that the rate of photodegradation was reduced in the presence of the organotin additives. The quantum yield of the chain scission was found to be low (9.8 × 10(-7)) when Ph₃SnL was used as a PVC photostabilizer compared to controlled PVC (5.18 × 10(-6)). In addition, the atomic force microscope images for the PVC films containing Ph₃SnL₂ after irradiation shows a smooth surface compared to the controlled films. The rate of PVC photostabilization was found to be highest for Ph₃SnL followed by Bu₂SnL₂ and Me₂SnL₂. It has been suggested that the organotin complexes could act as hydrogen chloride scavengers, ultraviolet absorbers, peroxide decomposers and/or radical scavengers.
Collapse
Affiliation(s)
- Mustafa M Ali
- Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, Iraq.
| | - Gamal A El-Hiti
- Cornea Research Chair, Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia.
| | - Emad Yousif
- Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, Iraq.
| |
Collapse
|
11
|
Mohamed NA, Abd El-Ghany NA, Fahmy MM. Thermogravimetric analysis in the evaluation of the inhibition of degradation of rigid poly(vinyl chloride) using biologically active phthalimido aromatic hydrazide derivatives. Polym Degrad Stab 2016. [DOI: 10.1016/j.polymdegradstab.2016.02.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
12
|
Study of New Thiazole Based Pyridine Derivatives as Potential Corrosion Inhibitors for Mild Steel: Theoretical and Experimental Approach. INTERNATIONAL JOURNAL OF CORROSION 2016. [DOI: 10.1155/2016/9532809] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Three new thiazole based pyridine derivatives 5-(4-methoxy-phenyl)-thiazole-2-carboxylic acid pyridin-2-ylmethylene-hydrazide (2-MTPH), 5-(4-methoxy-phenyl)-thiazole-2-carboxylic acid pyridin-3-ylmethylene-hydrazide (3-MTPH), and 5-(4-methoxy-phenyl)-thiazole-2-carboxylic acid pyridin-4-ylmethylene-hydrazide (4-MTPH) were synthesized and characterized. Corrosion inhibition performance of the prepared compounds on mild steel in 0.5 M HCl was studied using gravimetric, potentiodynamic polarisation, and electrochemical impedance techniques. Inhibition efficiency has direct relation with concentration and inverse relation with temperature. Thermodynamic parameters for dissolution and adsorption process were evaluated. Polarisation study reveals that compounds act as both anodic and cathodic inhibitors with emphasis on the former. Impedance study shows that decrease in charge transfer resistance is responsible for effective protection of steel surface by inhibitors. The film formed on the mild steel was investigated using FTIR, SEM, and EDX spectroscopy. Quantum chemical parameters likeEHOMO,ELUMO,ΔE, hardness, softness, and ionisation potential were calculated. Higher value ofEHOMOand lower value ofΔEindicate the better inhibition efficiency of the compounds. Lower ionisation potential of inhibitors indicates higher reactivity and lower chemical stability.
Collapse
|
13
|
Mohamed NA, Abd El-Ghany NA, Fahmy MM, Ahmed MH. Synergistic effect of maleimido phenyl urea derivatives mixed with some commercial stabilizers on the efficiency of thermal stabilization of PVC. POLYMER TESTING 2015; 44:66-71. [DOI: 10.1016/j.polymertesting.2015.03.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|
14
|
Mohamed NA, Abd El-Ghany NA, Fahmy MM, Ahmed MH. Thermally Stable Antimicrobial PVC/Maleimido Phenyl Thiourea Composites. ADVANCES IN POLYMER TECHNOLOGY 2015. [DOI: 10.1002/adv.21537] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nadia A. Mohamed
- Department of Chemistry; Faculty of Science, Cairo University; Giza 12613 Egypt
| | | | - Mona M. Fahmy
- Department of Chemistry; Faculty of Science, Cairo University; Giza 12613 Egypt
| | - Marwa H. Ahmed
- Department of Chemistry; Faculty of Science, Cairo University; Giza 12613 Egypt
| |
Collapse
|
15
|
Mansour AM, Mohamed RR. Sulfamethazine copper(ii) complexes as antimicrobial thermal stabilizers and co-stabilizers for rigid PVC: spectroscopic, thermal, and DFT studies. RSC Adv 2015. [DOI: 10.1039/c4ra07212j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Binary and ternary Cu(ii) complexes of the sulfamethazine antibacterial drug have been prepared, characterized, and tested for their antibacterial thermal stabilizer efficiency for PVC.
Collapse
Affiliation(s)
- Ahmed M. Mansour
- Chemistry Department
- Faculty of Science
- Cairo University
- Giza 12613
- Egypt
| | - Riham R. Mohamed
- Chemistry Department
- Faculty of Science
- Cairo University
- Giza 12613
- Egypt
| |
Collapse
|
16
|
Chen G, Gu L, Yao Y. A novel zinc-containing additive for the long-term thermal stabilization of poly(vinyl chloride). Polym Degrad Stab 2014. [DOI: 10.1016/j.polymdegradstab.2014.05.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
17
|
Mohamed NA, Abd El-Ghany NA, Fahmy MM, Ahmed MH. Thermally stable antimicrobial PVC/maleimido phenyl urea composites. Polym Bull (Berl) 2014. [DOI: 10.1007/s00289-014-1225-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
18
|
Abdel-Naby AS, Al-Ghamdi AA. Poly(vinyl chloride) blend with biodegradable cellulose acetate in presence of N-(phenyl amino) maleimides. Int J Biol Macromol 2014; 70:124-30. [PMID: 24973650 DOI: 10.1016/j.ijbiomac.2014.06.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 06/16/2014] [Accepted: 06/18/2014] [Indexed: 11/26/2022]
Abstract
Wider plastic applications of poly(vinyl chloride) (PVC) has raised serious problem to the environment. Since (PVC) waste products resist biodegradation and persist in the environment for longer time. The object of this study is to blend (PVC) with biodegradable cellulose acetate to thermally support the polymer during the molding process as well as to enhance the biodegradability of (PVC) waste products. Blending of poly(vinyl chloride) and cellulose acetate (CA) in presence of N-(phenyl amino) maleimides (R-PhAM) where (R=H, 4-NO2) led to improvement in the thermal stability of the blend film at high temperatures as shown from the high values of initial decomposition temperature (To) determined from their thermogravimetry (TG) curves. Also, blending (PVC) with (CA) led to improvement in the mechanical properties of the blend films as compared to (PVC). The crystalline regions of cellulose acetate enhanced the elasticity of the blend films as shown from their high Young's modulus values.
Collapse
Affiliation(s)
- Abir S Abdel-Naby
- Chemistry Department, Faculty of Science, Fayium University, Fayium 63111 Egypt.
| | - Azza A Al-Ghamdi
- Chemistry Department, Faculty of Science, Dammam University, Dammam, Saudi Arabia
| |
Collapse
|
19
|
Heimgartner H, Mlostoń G, Urbaniak K, Jacaszek N, Linden A. Exploration of Fluoral Hydrazones Derived from Carbohydrazides for the Synthesis of Trifluoromethylated Heterocycles. HETEROCYCLES 2014. [DOI: 10.3987/com-13-s(s)40] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
20
|
Ábrányi-Balogh P, Milen M, Dancsó A, Frigyes D, Pongó L, Keglevich G. Synthesis of Dihydrothienopyridine Derivatives Fused with Triazole Rings. HETEROATOM CHEMISTRY 2013. [DOI: 10.1002/hc.21087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Péter Ábrányi-Balogh
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; 1521; Budapest; Hungary
| | | | - András Dancsó
- EGIS Pharmaceuticals PLC.; Division for Chemical Research; 1475; Budapest; Hungary
| | - Dávid Frigyes
- EGIS Pharmaceuticals PLC.; Division for Chemical Research; 1475; Budapest; Hungary
| | - László Pongó
- EGIS Pharmaceuticals PLC.; Division for Chemical Research; 1475; Budapest; Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; 1521; Budapest; Hungary
| |
Collapse
|