Enhancing the physico-mechanical properties of ethylene propylene diene monomer rubber via ץ-radiation in the presence of bi-functional and tri-functional monomers
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Mai M. El-Zayat
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Maysa A. Mohamed
Abstract
This study, uses two polyfunctional monomers (PFMs) namely ethylene glycol dimethacrylate (EGDMA) as a bifunctional monomer and trimethylolpropane triacrylate (TMPTA) as a trifunctional monomer were used as co-agents in irradiation crosslinking of Ethylene Propylene Diene Monomer Rubber (EPDM). The effect of concentration of each PFM and irradiation dose on the crosslinking density, gel content, swelling behavior in motor and brake oils, in addition to the mechanical and thermal stability properties of EPDM was investigated in detailed. The results showed a remarkable increase in the gel content, crosslinking density and mechanical properties as the concentration of PFMs increased from 1 to 5 phr (parts per hundred parts of rubber). The various blends of EPDM with the trifunctional monomer express the highest gel content and crosslinking density than those with the bifunctional monomer. The addition of 5 phr of TMPTA to EPDM causes a dramatic improvement in tensile strength (TS) of the prepared blend reached to 188% compared to neat EPDM at 50 kGy. At the same time, the maximum TS of the blend containing 5 phr of EGDMA achieved only 41% compared to neat EPDM at an irradiation dose of 100 kGy. The swelling of irradiated samples in brake oil revealed a stronger oil resistance than motor oil. For all irradiated samples, the oil uptake decreased with the irradiation dose up to 100 kGy. The EPDM samples containing 5 phr of TMPTA recorded the highest oil resistance at 100 kGy. The results also showed that the addition of PFMs and irradiation treatment of the various prepared blends improved the thermal stability of EPDM. Finally, neat EPDM and the blends containing 1 and 3 phr of EGDMA can be used as radiation dosimeters in the very high dose range (50–200 kGy).
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Author contributions: Category 1. Conception and design of study: Mai M. El-Zayat, Maysa A. Mohamed, Eslam Aboelezz. Acquisition of data: Mai M. El-Zayat, Maysa A. Mohamed, Esalm Aboelezz. Analysis and/or interpretation of data: Mai M. El-Zayat, Maysa A. Mohamed, Esalm Aboelezz. Category 2. Drafting the manuscript: Mai M. El-Zayat, Maysa A. Mohamed, Esalm Aboelezz. Revising the manuscript critically for important intellectual content: Mai M. El-Zayat, Maysa A. Mohamed, Esalm Aboelezz. Category 3. Approval of the version of the manuscript to be published: Mai M. El-Zayat, Maysa A. Mohamed, Esalm Aboelezz.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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© 2021 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Original Papers
- Application of a novel gas phase synthesis approach to carbonyl complexes of accelerator-produced 5d transition metals
- Studies on nucleation and crystal growth kinetics of plutonium(IV) oxalatex
- Uranium sorption from waste solutions by Talc Phosphogypsum ferri-silicate synthetic new sorbent
- Investigation of Re(VII) diffusion in Tamusu clayrock core by through-diffusion method
- Elaboration of composite based on the incorporation of marble particles into polymeric framework for the removal of Co(II) and Eu(III)
- Studying the electrical conductivity and mechanical properties of irradiated natural rubber latex/magnetite nanocomposite
- Enhancing the physico-mechanical properties of ethylene propylene diene monomer rubber via ץ-radiation in the presence of bi-functional and tri-functional monomers
Artikel in diesem Heft
- Frontmatter
- Original Papers
- Application of a novel gas phase synthesis approach to carbonyl complexes of accelerator-produced 5d transition metals
- Studies on nucleation and crystal growth kinetics of plutonium(IV) oxalatex
- Uranium sorption from waste solutions by Talc Phosphogypsum ferri-silicate synthetic new sorbent
- Investigation of Re(VII) diffusion in Tamusu clayrock core by through-diffusion method
- Elaboration of composite based on the incorporation of marble particles into polymeric framework for the removal of Co(II) and Eu(III)
- Studying the electrical conductivity and mechanical properties of irradiated natural rubber latex/magnetite nanocomposite
- Enhancing the physico-mechanical properties of ethylene propylene diene monomer rubber via ץ-radiation in the presence of bi-functional and tri-functional monomers
