Synthesis of 2-Alkylbenzimidazole Moiety as a Novel Antioxidant and Its Effect on Physico-mechanical and Electrical Properties of Acrylonitrile Butadiene Rubber | ||||
| Egyptian Journal of Chemistry | ||||
| Article 18, Volume 63, Issue 6, June 2020, Page 2235-2248 PDF (1.99 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2019.19133.2184 | ||||
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| Authors | ||||
Ayman Mohammed Mohammed1; Emad Saad Shafik   2; Ahmed Ismael Hussein3; Hamed Ahmed Derbala4; Ahmed Kamel Elziaty5; Galal Abd El-megid Elsayed6
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| 1Chemistry department, faculty of science, Ain Shams University, Cairo, Egypt. | ||||
| 2Polymer and Pigments Department, chemical industries division, National Research Centre | ||||
| 3National Research Centre, 30 El-Tahrir Street | ||||
| 4Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, Cairo 11566, Egypt. | ||||
| 5Chemistry Department, Faculty of Science, Ain Shams University, Cairo , Egypt. | ||||
| 6Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt. | ||||
| Abstract | ||||
| In the present work, 2-propyl-, and 2-heptyl-, 1H-benzo[d]imidazole were prepared by condensation reaction of o-phenylenediamine with n-butanoic acid and n-octanoic acid, respectively. The prepared products were characterized by FT-IR, 1H-NMR spectroscopy and melting point. These products were incorporated into acrylonitrile butadiene rubber (NBR) composites with two different fillers (Silica and High Abrasion Furnace carbon black HAF) as an antioxidant additive with different concentrations from 1up to 2 phr as a comparison with 2,2,4-trimethyl-1,2-dihydroquino-line (TMQ) as a traditional antioxidant. Their effects on the rheometric, physico-mechanical and electrical properties of NBR composites were evaluated. Thermo-oxidative aging was carried out for NBR composites and distribution of the prepared products observed by Scanning Electron Microscope (SEM).The results showed that the prepared products can act as highly efficient antioxidants in acrylonitrile butadiene rubber vulcanizates comparing with commercial antioxidant TMQ and revealed that there was enhancement in mechanical properties of NBR composites that containing the prepared products, as well. The results also illustrated that the optimum ratio from 2-alkylbenzimidazole incorporated into acrylonitrile butadiene rubber vulcanizates is 1.5 phr if compared with the same ratio from traditional antioxidant (TMQ). | ||||
| Keywords | ||||
| 2-Alkyl-1H-benzo[d]imidazole; 2; 4-trimethyl-1; 2-dihydroquinoline; antioxidant; physico-mechanical and electrical properties | ||||
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