1
|
Zaharescu T, Dumitru A, Borbath T, Ionescu I, Borbath I, Boros TF. The Contribution of BaTiO 3 to the Stability Improvement of Ethylene-Propylene-Diene Rubber: Part II-Doped Filler. Polymers (Basel) 2023; 15:3441. [PMID: 37631498 PMCID: PMC10459972 DOI: 10.3390/polym15163441] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 08/10/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023] Open
Abstract
The thermal and radiation stabilities of the formulations based on ethylene-propylene-diene rubber (EPDM), which contain barium titanate (BaTiO3) doped with lanthanum and cerium oxides, were investigated by chemiluminescence and mechanical testing. The contributions of these doped fillers are related to the surface interaction between the structural defects (doping atoms, i.e., lanthanum and cerium) implanted in the filler lattice and the molecular fragments formed during the progress of degradation. These composite materials present extended durabilities with respect to the references; the oxidation periods are a minimum of three times longer than the corresponding times for pristine polymers. This behavior is associated with the scavenging activity of dopants. Mechanical testing has demonstrated the contributions of doped filler to the improvement of tensile strength and elongation at break by the restructuration of the polymer phase. Scanning electron microscopy images revealed the densification of materials in the presence of doped barium titanates. All the investigations constitute valid proof for the qualification of BaTiO3 doped with Ce as the more efficient stabilizer compared to the same inorganic filler doped with La.
Collapse
Affiliation(s)
- Traian Zaharescu
- INCDIE ICPE CA, 313 Splaiul Unirii, 030138 Bucharest, Romania;
- ROSEAL SA, 5A Nicolae Balcescu, 535600 Odorheiu Secuiesc, Romania; (I.B.); (T.F.B.)
| | - Alina Dumitru
- INCDIE ICPE CA, 313 Splaiul Unirii, 030138 Bucharest, Romania;
| | - Tunde Borbath
- ROSEAL SA, 5A Nicolae Balcescu, 535600 Odorheiu Secuiesc, Romania; (I.B.); (T.F.B.)
| | - Ioana Ionescu
- ECOIND, 57-73 Drumul Podu Dambovitei, 060653 Bucharest, Romania;
| | - Istvan Borbath
- ROSEAL SA, 5A Nicolae Balcescu, 535600 Odorheiu Secuiesc, Romania; (I.B.); (T.F.B.)
| | | |
Collapse
|
2
|
Stabilization Activity of Kelp Extract in Ethylene-Propylene Rubber as Safe Packaging Material. Polymers (Basel) 2023; 15:polym15040977. [PMID: 36850259 PMCID: PMC9967782 DOI: 10.3390/polym15040977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 02/12/2023] [Accepted: 02/13/2023] [Indexed: 02/18/2023] Open
Abstract
This paper presents the stabilization effects of the solid extract of kelp (Ascophyllum nodosum) on an engineering elastomer, ethylene-propylene copolymer (EPR), which may be used as packaging material. Progressive increase in additive loadings (0.5, 1, and 2 phr) increases the oxidation induction time for thermally aged rubber at 190 °C from 10 min to 30 min for pristine material and modified polymer by adding 2 phr protection powder. When the studied polymer is γ-irradiated at 50 and 100 kGy, the onset oxidation temperatures increase as a result of blocking the oxidation reactivity of free radicals. The stabilization effect occurs through the activity of alginic acid, which is one of the main active components associated with alginates. The accelerated degradation caused by γ-exposure advances more slowly when the kelp extract is present. The OOT value for the oxidation of EPR samples increases from 130 °C to 165 °C after the γ-irradiation of pristine and modified (2 phr of kelp powder) EPR, respectively. The altered oxidation state of EPR samples by the action of γ-rays in saline serum is faster in neat polymer than in stabilized material. When the probes are placed in physiological serum and irradiated at 25 kGy, the OOT value for neat EPR (145 °C) is much lower than the homologous value for the polymer samples protected by kelp extract (153 °C for the concentration of 0.5 phr, 166 °C for the concentration of 1 phr, and 185 °C for the concentration of 2 phr).
Collapse
|
3
|
Zaharescu T, Nicula N, Râpă M, Iordoc M, Tsakiris V, Marinescu VE. Structural Insights into LDPE/UHMWPE Blends Processed by γ-Irradiation. Polymers (Basel) 2023; 15:polym15030696. [PMID: 36771997 PMCID: PMC9920361 DOI: 10.3390/polym15030696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/19/2023] [Accepted: 01/26/2023] [Indexed: 01/31/2023] Open
Abstract
Ultra-high-molecular-weight polyethylene (UHMWPE) matrices containing low-density polyethylene (LDPE), hydroxyapatite (HAp) as filler, and rosemary extract (RM) as stabilizer were investigated for their qualification for long-term applications. The significant contributions of the blend components were analyzed, and variations in mechanical properties, oxidation strength, thermal behavior, crystallinity, and wettability were discussed. SEM images of microstructural peculiarities completed the introspective survey. The stability improvement due to the presence of both additives was an increase in the total degradation period of 67% in comparison with an unmodified HDPE/UHMWPE blend when the materials were subjected to a 50 kGy γ-dose. There was growth in activation energies from 121 kJ mol-1 to 139 kJ mol-1 when HAp and rosemary extract delayed oxidation. The exposure of samples to the action of γ-rays was found to be a proper procedure for accomplishing accelerated oxidative degradation. The presence of rosemary extract and HAp powder significantly increased the thermal and oxidation resistances. The calculation of material lifetimes at various temperatures provided meaningful information on the wearability and integrity of the inspected composites.
Collapse
Affiliation(s)
- Traian Zaharescu
- INCDIE ICPE CA, 3131 Splaiul Unirii, 030138 Bucharest, Romania
- Correspondence: (T.Z.); (N.N.)
| | - Nicoleta Nicula
- INCDIE ICPE CA, 3131 Splaiul Unirii, 030138 Bucharest, Romania
- Correspondence: (T.Z.); (N.N.)
| | - Maria Râpă
- Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Mihai Iordoc
- INCDIE ICPE CA, 3131 Splaiul Unirii, 030138 Bucharest, Romania
| | | | | |
Collapse
|
4
|
Kossov A, Makrushin V, Levin I, Matson S. The Effect of Thermal Annealing on the Structure and Gas Transport Properties of Poly(1-Trimethylsilyl-1-Propyne) Films with the Addition of Phenolic Antioxidants. Polymers (Basel) 2023; 15:polym15020286. [PMID: 36679167 PMCID: PMC9862662 DOI: 10.3390/polym15020286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/26/2022] [Accepted: 01/03/2023] [Indexed: 01/09/2023] Open
Abstract
The thermally activated relaxation of poly(1-trimethylsilyl-1-propyne) (PTMSP) samples of various cis-/trans-compositions (50-80% units of cis-configuration) in the presence of phenolic antioxidants of various structures was investigated. It was pointed out that polymers with a high content of cis-units exhibited greater thermal-oxidative stability due to the greater flexibility of the cis-enriched macrochains. The use of hindered phenols as antioxidants made it possible to prevent the process of thermally initiated oxidative degradation. At the same time, the most effective stabilizing agents were antioxidants with larger molecules such as Vulkanox BKF, Irganox 1010, and Irganox 1076. It was shown that the permeability coefficients of stabilized PTMSP during thermal treatment initially slightly decreased (by 20-30%), which, according to the X-ray diffraction data, was associated with an increase in the density of the macrochain packing, and during further heating remained practically unchanged. Note that for the cis-enriched samples, no signs of oxidation or decrease in the transport characteristics were observed during polymer heating for 240 h at 140 °C.
Collapse
|
5
|
Structural configuration-radiation stability relationship in the degradation of dumbbelled POSSs. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2022.110001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
6
|
Zaharescu T, Blanco I. Stabilization Effects of Natural Compounds and Polyhedral Oligomeric Silsesquioxane Nanoparticles on the Accelerated Degradation of Ethylene-Propylene-Diene Monomer. Molecules 2021; 26:molecules26154390. [PMID: 34361544 PMCID: PMC8347017 DOI: 10.3390/molecules26154390] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/16/2021] [Accepted: 07/19/2021] [Indexed: 11/16/2022] Open
Abstract
In this work the analysis on the stabilization activities of some natural antioxidants (rosemary extract, capsaicin, quercetin or oleanolic acid) is presented. A similar contribution of an inorganic structure-polyhedral oligomeric silsesquioxane (POSS) nanoparticles-is also evaluated. The stabilization effects on the oxidation protection were investigated for several formulations based on ethylene-propylene-diene-terpolymer (EPDM). The samples were examined in pristine state or after γ-irradiation, when the accelerated degradation scission of polymer macromolecules followed by the mitigation of oxidation. Three evaluation procedures: chemiluminescence, FTIR spectroscopy and thermal analysis were applied for the characterization of stability efficiency. The delaying effect of oxidative aging in EPDM matrix is illustrated by the values of activation energy, which are correlated with the type and concentration of embedded compounds. The durability of studied EPDM formulations is discussed for the assessment of material life. The improved behavior of structured hybrids useful for the optimization application regimes is essentially based on the antioxidant properties of polyphenolic components in the cases of natural antioxidants or on the penetration of free radical intermediates into the free volumes of POSS.
Collapse
Affiliation(s)
- Traian Zaharescu
- INCDIE ICPE-CA, 313 Splaiul Unirii, 03138 Bucharest, Romania
- Correspondence: ; Tel.: +40-72-663-6222
| | - Ignazio Blanco
- Department of Civil Engineering and Architecture, University of Catania, V.le A. Doria 6, 95125 Catania, Italy;
| |
Collapse
|
7
|
Chemiluminescence study on the radiochemical stability of polypropylene modified with microalgal extracts. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109401] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
8
|
Wan L, Guo K, Zhu J, Wang F, Zhu Y, Deng S, Qi H. Improvement of the oxidation resistance of silicon‐containing arylacetylene resins upon the introduction of carbazoles. J Appl Polym Sci 2020. [DOI: 10.1002/app.49642] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ling Wan
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Materials Science and Engineering East China University of Science and Technology Shanghai China
| | - Kangkang Guo
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Materials Science and Engineering East China University of Science and Technology Shanghai China
- Shanghai Key Laboratory of Advanced Polymeric Materials East China University of Science and Technology Shanghai China
| | - Junli Zhu
- Shanghai Key Laboratory of Advanced Polymeric Materials East China University of Science and Technology Shanghai China
| | - Fan Wang
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Materials Science and Engineering East China University of Science and Technology Shanghai China
| | - Yaping Zhu
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Materials Science and Engineering East China University of Science and Technology Shanghai China
| | - Shifeng Deng
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Materials Science and Engineering East China University of Science and Technology Shanghai China
| | - Huimin Qi
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Materials Science and Engineering East China University of Science and Technology Shanghai China
| |
Collapse
|
9
|
Salehi MH, Karimi AR. Novel octa-substituted metal (II) phthalocyanines bearing 2,6-di-tert-buthylphenol groups: Synthesis, characterization, electronic properties, aggregation behavior and their antioxidant activities as stabilizer for polypropylene and high density polyethylene. Polym Degrad Stab 2018. [DOI: 10.1016/j.polymdegradstab.2018.03.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
10
|
Li C, Zhai X, Guo S, Li H, Sun P, Wang H, Wang J. Antiradical Ability of Dendrimer-Bridged Hindered Phenol and Its Antioxidant Property in Polyolefin. ChemistrySelect 2017. [DOI: 10.1002/slct.201701114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Cuiqin Li
- Provincial Key Laboratory of Oil&Gas Chemical Technology; College of Chemistry & Chemical Engineering; Northeast Petroleum University; Daqing, Heilongjiang 163318 China
| | - Xue Zhai
- Provincial Key Laboratory of Oil&Gas Chemical Technology; College of Chemistry & Chemical Engineering; Northeast Petroleum University; Daqing, Heilongjiang 163318 China
| | - Suyue Guo
- Provincial Key Laboratory of Oil&Gas Chemical Technology; College of Chemistry & Chemical Engineering; Northeast Petroleum University; Daqing, Heilongjiang 163318 China
| | - Huanyu Li
- Provincial Key Laboratory of Oil&Gas Chemical Technology; College of Chemistry & Chemical Engineering; Northeast Petroleum University; Daqing, Heilongjiang 163318 China
| | - Peng Sun
- Provincial Key Laboratory of Oil&Gas Chemical Technology; College of Chemistry & Chemical Engineering; Northeast Petroleum University; Daqing, Heilongjiang 163318 China
| | - Hua Wang
- Daqing Petrochemical Research Center; CNPC; Daqing, Heilongjiang 163318 China
| | - Jun Wang
- Provincial Key Laboratory of Oil&Gas Chemical Technology; College of Chemistry & Chemical Engineering; Northeast Petroleum University; Daqing, Heilongjiang 163318 China
| |
Collapse
|
11
|
Wang J, Wang Y, Song L, Wang H, Wang J, Li C. Synthesis and antioxidant capacity of a C12-naphthylamine antioxidant in polyethylene. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-1917-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
12
|
Dao ATN, Nakayama K, Shimokata J, Taniike T. Multilateral characterization of recombinant spider silk in thermal degradation. Polym Chem 2017. [DOI: 10.1039/c6py01954d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Elucidating the complex mechanism of thermo-oxidative degradation of recombinant spider silk by systematic characterization and correlation coefficient approach.
Collapse
Affiliation(s)
- Anh T. N. Dao
- School of Materials Science
- Japan Advanced Institute of Science and Technology
- Nomi
- Japan
| | - K. Nakayama
- School of Materials Science
- Japan Advanced Institute of Science and Technology
- Nomi
- Japan
| | - J. Shimokata
- School of Materials Science
- Japan Advanced Institute of Science and Technology
- Nomi
- Japan
- Spiber Inc
| | - T. Taniike
- School of Materials Science
- Japan Advanced Institute of Science and Technology
- Nomi
- Japan
| |
Collapse
|
13
|
Rychlý J, Mosnáčková K, Rychlá L, Fiedlerová A, Kasza G, Nádor A, Osváth Z, Stumphauser T, Szarka G, Czaníková K, Chmela Š, Iván B, Mosnáček J. Comparison of the UV stabilisation effect of commercially available processing stabilizers Irganox HP 136 and Irganox 1010. Polym Degrad Stab 2015. [DOI: 10.1016/j.polymdegradstab.2015.04.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
14
|
Cork extractives exhibit thermo-oxidative protection properties in polypropylene–cork composites and as direct additives for polypropylene. Polym Degrad Stab 2015. [DOI: 10.1016/j.polymdegradstab.2015.03.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
15
|
Turkovic V, Engmann S, Tsierkezos N, Hoppe H, Ritter U, Gobsch G. Long-term stabilization of organic solar cells using hindered phenols as additives. ACS APPLIED MATERIALS & INTERFACES 2014; 6:18525-18537. [PMID: 25279719 DOI: 10.1021/am5024989] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on the improvement of long-term stability of organic solar cells (OPV) using hindered phenol based antioxidants as stabilizing additives. A set of seven commercially available hindered phenols are investigated for use in bulk-heterojunction OPV. Polymer:fullerene films based on poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) are characterized with respect to the initial power conversion efficiency and the long-term stability improvement under illumination in ambient conditions. FTIR spectroscopy is used to trace chemical degradation over time. OPV performance is recorded under ISOS-3 conditions, and an improved long-term performance of OPV devices, manifested in increased accumulated power generation (APG), is found for octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate. Using this additive, APG is increased by a factor of 3 compared to the reference. Observed differences in the stabilization of tested additives are discussed in terms of energetic trap states formation within the HOMO/LUMO gap of the photoactive material, morphological changes, and chemical structure.
Collapse
Affiliation(s)
- Vida Turkovic
- Institute of Physics and Institute of Micro- and Nanotechnologies, Ilmenau University of Technology , 98683 Ilmenau, Germany
| | | | | | | | | | | |
Collapse
|
16
|
Ariffin A, Rahman NA, Yehye WA, Alhadi AA, Kadir FA. PASS-assisted design, synthesis and antioxidant evaluation of new butylated hydroxytoluene derivatives. Eur J Med Chem 2014; 87:564-77. [DOI: 10.1016/j.ejmech.2014.10.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Revised: 09/02/2014] [Accepted: 10/01/2014] [Indexed: 01/22/2023]
|
17
|
Jeong MJ, Dupont AL, de la Rie ER. Degradation of cellulose at the wet–dry interface. II. Study of oxidation reactions and effect of antioxidants. Carbohydr Polym 2014; 101:671-83. [DOI: 10.1016/j.carbpol.2013.09.080] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 08/26/2013] [Accepted: 09/19/2013] [Indexed: 10/26/2022]
|
18
|
Wang X, Wang B, Song L, Wen P, Tang G, Hu Y. Antioxidant behavior of a novel sulfur-bearing hindered phenolic antioxidant with a high molecular weight in polypropylene. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2013.05.019] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
19
|
Duque L, Zapata C, Rojano B, Schneider B, Otálvaro F. Radical scavenging capacity of 2,4-dihydroxy-9-phenyl-1H-phenalen-1-one: a functional group exclusion approach. Org Lett 2013; 15:3542-5. [PMID: 23834597 DOI: 10.1021/ol400384z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
2,4-Dihydroxy-9-phenyl-1H-phenalen-1-one (4-hydroxyanigorufone, 1), a compound isolated from Anigozanthos flavidus and Monochoria elata, displayed a high radical scavenging capacity in the ORAC assay. A systematic approach was adopted in order to explore the effect of each functional group. H-Atom transfer from the phenolic hydroxyl, a captodative effect from the hydroxy ketone, and the presumed involvement of the phenyl ring in the termination step of the radical reaction were disclosed as relevant features of this type of antioxidant.
Collapse
Affiliation(s)
- Luisa Duque
- Instituto de Química, Síntesis y Biosíntesis de Metabolitos Naturales, Universidad de Antioquia, A.A 1226, Medellín, Colombia
| | | | | | | | | |
Collapse
|
20
|
|
21
|
Effect of chitosan derivatives as rubber antioxidants for increasing durability. RESEARCH ON CHEMICAL INTERMEDIATES 2013. [DOI: 10.1007/s11164-013-1046-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
22
|
Mosadegh-Sedghi S, Brisson J, Rodrigue D, Iliuta MC. Morphological, chemical and thermal stability of microporous LDPE hollow fiber membranes in contact with single and mixed amine based CO2 absorbents. Sep Purif Technol 2012. [DOI: 10.1016/j.seppur.2012.05.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
23
|
Synthesis, antioxidant, and antibacterial studies of phenolic esters and amides of 2-(1-benzofuran-2-yl) quinoline-4-carboxylic acid. Med Chem Res 2012. [DOI: 10.1007/s00044-012-0117-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
24
|
Synthesis and antioxidant activities in polyolefin of dendritic antioxidants with hindered phenolic groups and tertiary amine. J Appl Polym Sci 2011. [DOI: 10.1002/app.35324] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
25
|
Pospíšil J, Nešpůrek S. Highlights in chemistry and physics of polymer stabilization. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19971150110] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
26
|
Habicher WD, Bauer I, Scheim K, Rautenberg C, Loßack A, Yamaguchi K. Interactions of stabilizers during oxidation processes. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19971150108] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
27
|
Abdelwahab N, El-Nashar D, El-Ghaffar MA. Polyfuran, polythiophene and their blend as novel antioxidants for styrene- butadiene rubber vulcanizates. MATERIALS & DESIGN 2011; 32:238-245. [DOI: 10.1016/j.matdes.2010.06.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|
28
|
Meng X, Xin Z, Wang XF. Structure effect of benzofuranone on the antioxidant activity in polypropylene. Polym Degrad Stab 2010. [DOI: 10.1016/j.polymdegradstab.2010.06.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
29
|
El-Wakil AEA, Barakat MA. Study of the effect of natural rubber-graft-o-aminophenol on the thermal stability and mechanical properties of nitrile rubber. J Appl Polym Sci 2010. [DOI: 10.1002/app.32934] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
30
|
Cai Z, Meng X, Shen B, Xin Z. Structure effect of benzofuranone on the anti-oxidation kinetics in polypropylene. ASIA-PAC J CHEM ENG 2010. [DOI: 10.1002/apj.499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
31
|
Meng X, Xin Z. Effect of hydrogen donating ability of benzofuranone on the antioxidant activity. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s11434-009-0691-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
32
|
Enhancement the Thermal Stability and the Mechanical Properties of Acrylonitrile-Butadiene Copolymer by Grafting Antioxidant. INT J POLYM SCI 2010. [DOI: 10.1155/2010/981690] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Monomeric antioxidants are widely used as effective antioxidants to protect polymers against thermal oxidation. Low molecular weight antioxidants are easily lost from polymer through migration, evaporation, and extraction. Physical loss of antioxidants is considered to be major concern in the environmental issues and safety regulation as well as long life time of polymers. The grafting copolymerization of natural rubber ando-aminophenol was carried out by using two-roll mill machine. The prepared natural rubber-graft-o-Aminophenol, NR-graft-o-AP, was analysed by using Infrared and1-NMR Spectroscopy techniques. The thermal stability, mechanical properties, and ultrasonic attenuation coefficient were evaluated for NBR vulcanizates containing the commercial antioxidant, N-phenyl--naphthylamine (PBN), the prepared grafted antioxidant, NR-graft-o-AP, and the control vulcanizate. Results of the thermal stability showed that the prepared NR-graft-o-AP can protect NBR vulcanizate against thermal treatment much better than the commercial antioxidant, PBN, and control mix, respectively. The prepared grafted antioxidant improves the mechanical properties of NBR vulcanizate.
Collapse
|
33
|
Martínez G, Gómez MA, Marco C, Ellis G, Gómez R, Segura JL. Synthesis of a [60] fullerene-Functionalized isotactic polypropylene derivative. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.22979] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
34
|
El-Wakil AA. Amelioration of acrylonitrile–butadiene copolymer properties using natural rubber graftp-aminophenol. J Appl Polym Sci 2007. [DOI: 10.1002/app.25727] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
35
|
Study on the hydrogen donating abilities of benzofuranones as chain-breaking antioxidants using laser flash photolysis technique. Polym Degrad Stab 2007. [DOI: 10.1016/j.polymdegradstab.2006.07.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
36
|
|
37
|
Zaharescu T, Kaci M, Setnescu R, Jipa S, Touati N. Thermal stability evaluation of polypropylene protected with grafted amine. Polym Bull (Berl) 2006. [DOI: 10.1007/s00289-006-0505-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
38
|
Malshe VC, Elango S, Rane S. Alkylated phenolic resins as antioxidants for rubber. J Appl Polym Sci 2006. [DOI: 10.1002/app.22736] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
39
|
Wazzan AA, Ismail MN, Abd El Ghaffar MA. Evaluation of Some Polyaromatic Amines as Antirads and Antifatigue Agents in SBR Vulcanizates. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2005. [DOI: 10.1080/10236660500345976] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
40
|
Epacher E, Kröhnke C, Pukánszky B. Effect of catalyst residues on the chain structure and properties of a Phillips type polyethylen. POLYM ENG SCI 2004. [DOI: 10.1002/pen.11275] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
41
|
Catalina F, Peinado C, Allen NS, Corrales T. Chemiluminescence of polyethylene: The comparative antioxidant effectiveness of phenolic stabilizers in low-density polyethylene. ACTA ACUST UNITED AC 2002. [DOI: 10.1002/pola.10419] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
42
|
Salem MA, Farouk H, Kashif I. Physicochemical changes in UV- exposed low- density polyethylene films. Macromol Res 2002. [DOI: 10.1007/bf03218267] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
43
|
Peña J, Allen N, Edge M, Liauw C, Valange B. Studies of synergism between carbon black and stabilisers in LDPE photodegradation. Polym Degrad Stab 2001. [DOI: 10.1016/s0141-3910(01)00033-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
44
|
Peña J, Allen N, Edge M, Liauw C, Valange B. Interactions between carbon black and stabilisers in LDPE thermal oxidation. Polym Degrad Stab 2001. [DOI: 10.1016/s0141-3910(01)00016-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
45
|
|
46
|
|
47
|
Chemical reactions during the processing of stabilized PE: 1. Discolouration and stabilizer consumption. Polym Degrad Stab 1999. [DOI: 10.1016/s0141-3910(98)00078-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
48
|
Epacher E, Fekete E, Gahleitner M, Pukánszky B. Chemical reactions during the processing of stabilized PE: 2. Structure/property correlations. Polym Degrad Stab 1999. [DOI: 10.1016/s0141-3910(98)00079-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
49
|
Zaharescu T, Giurginca M, Jipa S. Radiochemical oxidation of ethylene–propylene elastomers in the presence of some phenolic antioxidants. Polym Degrad Stab 1999. [DOI: 10.1016/s0141-3910(98)00100-1] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
50
|
Preparation, photochemical stability and photostabilizing efficiency of adducts of 1,8-naphthaleneimide and hindered amine stabilizers in polymer matrices. Polym Degrad Stab 1999. [DOI: 10.1016/s0141-3910(98)00088-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|