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Заглавие документа: Chlorinated Solvent-Free Living Cationic Ring-Opening Polymerization of Epichlorohydrin Using BF3•OEt2 as Co-Initiator: Toward Perfectly Functionalized Poly(epichlorohydrin) Diols
Авторы: Timofeev, G.V.
Hulnik, M.I.
Vasilenko, I.V.
Ganachaud, F.
Jacob, G.
Kostjuk, S.V.
Тема: ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Химия
Дата публикации: 2023
Издатель: American Chemical Society
Библиографическое описание источника: ACS Applied Polymer Materials 2023; 5(8): 6549-6561
Аннотация: The cationic ring-opening polymerization of epichlorohydrin co-initiated by BF3•Et2O has been investigated here. Fast synthesis of pure poly(epichlorohydrin) diols (Fn(OH) ≈ 2.0) with controlled molar mass (Mn up to 4000 g mol–1) and low dispersity (Đ < 1.25) was performed both in toluene and in bulk. An original approach was developed here, consisting of first generating in situ the initiator through the BF3•Et2O-catalyzed reaction of ECH with water, leading to a mixture of oligomers with better solubility in the reaction medium than conventional initiators previously used. Then, through a second monomer starved-feed step, polymerization proceeds exclusively through the activated monomer mechanism, allowing perfect control of the polymer growth. The developed procedure was successfully upscaled to 100 g of polymer to validate a future industrial production of PECH, as well as its derivative glycidyl azide polymer (GAP), the most important energetic binder for solid propellants. Additionally, a separate study was performed to elucidate the reasons for coloration of the polymer observed in the course of polymerization and/or under storage
URI документа: https://elib.bsu.by/handle/123456789/324760
DOI документа: 10.1021/acsapm.3c01105
Финансовая поддержка: The authors thank EURENCO for financial support of this research. S.K. and F.G. thank Dr. Geneviève Eck and Dr. Thibaud Alaime for useful discussions of the obtained results. This work is also partially supported by State Program for Scientific Research of Belarus “Chemical processes, reagents and technologies, bioregulators and bioorganic chemistry” (project 2.1.01.03).
Лицензия: info:eu-repo/semantics/openAccess
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