Studies of the end-capping of living anionic poly(ferrocenyldimethylsilane) with 1,1-diphenylethylene

Autor:	Lawrence Vanderark, Estera Januszewski, Jessica Gwyther, Ian Manners
Rok vydání:	2011
Předmět:	Polymers and Plastics Chemistry Organic Chemistry General Physics and Astronomy Ring-opening polymerization chemistry.chemical_compound Anionic addition polymerization Monomer Reagent Polymer chemistry Materials Chemistry Copolymer Reactivity (chemistry) Self-assembly Living anionic polymerization
Zdroj:	European Polymer Journal. 47:823-826
ISSN:	0014-3057
DOI:	10.1016/j.eurpolymj.2010.10.026
Popis:	The efficiency of capping poly(ferrocenyldimethylsilane) (PFDMS) with 1,1-diphenylethylene (DPE) at room temperature and at 50 °C is reported. The capping of living anionic PFDMS chains was investigated by synthesizing short PFDMS oligomers of 10 repeat monomer units for which the end groups can be probed by 1H NMR. DPE is known to mediate the reactivity of the PFDMS, permitting the synthesis of block copolymers unobtainable by direct, sequential, living anionic polymerization such as poly(ferrocenyldimethylsilane)-block-poly(methylmethacrylate) (PFDMS-b-PMMA) and poly(ferrocenyldimethylsilane)-block-poly(2-vinylpyridine) (PFDMS-b-P2VP). However, at room temperature addition of the DPE is slow. We report that carrying out the capping of living PFDMS chains at elevated temperatures (50 °C) avoids the need to use a second reagent to facilitate the addition of DPE, or follow more complex synthetic routes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::686fe027d598faefb757aca80cb0c009 https://doi.org/10.1016/j.eurpolymj.2010.10.026 Zobrazit plný text záznamu Full Text from ScienceDirect