نمایش مختصر رکورد

dc.contributor.authorFarivarzadeh, Melikaen_US
dc.contributor.authorJahanmardi, Rezaen_US
dc.date.accessioned1399-07-08T18:20:19Zfa_IR
dc.date.accessioned2020-09-29T18:20:19Z
dc.date.available1399-07-08T18:20:19Zfa_IR
dc.date.available2020-09-29T18:20:19Z
dc.date.issued2020-04-01en_US
dc.date.issued1399-01-13fa_IR
dc.date.submitted2020-01-11en_US
dc.date.submitted1398-10-21fa_IR
dc.identifier.citationFarivarzadeh, Melika, Jahanmardi, Reza. (2020). Preparation of a new polymeric antioxidant for polypropylene based on phenylmalonic acid. Frontiers in Chemical Research, 2(1), 18-25. doi: 10.22034/fcr.2020.119937.1016en_US
dc.identifier.urihttps://dx.doi.org/10.22034/fcr.2020.119937.1016
dc.identifier.urihttp://fcr.ilam.ac.ir/article_39050.html
dc.identifier.urihttps://iranjournals.nlai.ir/handle/123456789/41720
dc.description.abstractStabilization of polypropylene (PP) against thermal oxidation, due to the susceptibility of this commodity polymer to oxidation, is of great importance from both scientific and industrial points of view. The present work aimed at preparing a new polymeric antioxidant for polypropylene, which has no tendency toward migration from the polymer. Accordingly, a diacid (phenylmalonic acid), which has a labile hydrogen atom and can act as a hydrogen donor antioxidant, was polymerized with 1,4-phenylenediamine to render a polyamide. Occurrence of the reaction was confirmed by FT-IR spectroscopy, differential scanning calorimetry (DSC), gel permeation chromatography and thermogravimetric analysis (TGA). The synthesized polyamide was melt-mixed with PP and its uniform distribution in the matrix was verified by the yellowness index measurements. Oxidation onset temperature and oxidative induction time of the samples using DSC proved that the additive enhances stability of the polymer remarkably in melt state. However, its stabilization efficiency is not as outstanding as that of SONGNOX 1010; a conventional antioxidant for PP. But oven ageing experiments followed by FT-IR spectroscopy revealed that the synthesized antioxidant amends thermo-oxidative stability of the polymer in solid state with an eminent efficiency which is even better than that of SONGNOX 1010. Furthermore, its remarkable stabilization activity was proved by DPPH method. Finally, the synthesized polyamide's potential, as an efficient antioxidant for PP, especially in the long-term stabilization, was assigned to the presence of the two different hydrogen donor groups, i.e. allylic and amine hydrogen atoms, in the molecular structure of the new antioxidant.en_US
dc.format.extent805
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoen_US
dc.publisherIlam Universityen_US
dc.relation.ispartofFrontiers in Chemical Researchen_US
dc.relation.isversionofhttps://dx.doi.org/10.22034/fcr.2020.119937.1016
dc.subjectInfrared spectroscopyen_US
dc.subjectPolymeren_US
dc.subjectThermal oxidationen_US
dc.subjectThermo-oxidative stabilizationen_US
dc.subjectOrganic Chemistryen_US
dc.titlePreparation of a new polymeric antioxidant for polypropylene based on phenylmalonic aciden_US
dc.typeTexten_US
dc.typeOriginal Articleen_US
dc.contributor.departmentDepartment of Polymer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iranen_US
dc.contributor.departmentDepartment of Polymer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iranen_US
dc.citation.volume2
dc.citation.issue1
dc.citation.spage18
dc.citation.epage25
nlai.contributor.orcid0000-0003-0463-6017


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