2358-84-1Relevant articles and documents
Photopolymerization of Poly(ethylene glycol) dimethacrylates: The influence of ionic liquids on the formulation and the properties of the resultant polymer materials
Chesnokov, Sergey A.,Zakharina, Marya Yu.,Shaplov, Alexander S.,Lozinskaya, Elena I.,Malyshkina, Inna A.,Abakumov, Gleb A.,Vidal, Frederic,Vygodskii, Yakov S.
, p. 2388 - 2409 (2010)
The photo-initiated polymerization of poly(ethylene glycol)dimethacrylates [PEGDM(n)] in the presence of various ionic liquids (ILs) is reported. The influence of ILs concentrations as well as of their nature upon the photopolymerization kinetics was studied in detail. It was found that according to reactive ability in bulk and in solution photopolymerization, the investigated monomers can be divided into two groups: PEGDM(1)-PEGDM(2)-PEGDM(3) and PEGDM(4)-PEGDM(7-8). ILs slightly influence the photopolymerization of monomers from the first group and greatly change kinetics of those from the second. Such behavior was explained by the theory of "kinetically favorable or unfavorable monomer associations." It was demonstrated that certain ILs accelerate the photopolymerization of the highest PEGDMs and offer access to the polymers derived from low reactive monomers. Relying on the obtained data, the attempt to predict the structu re of the "best" ionic additive for the given monomer photopolymerization was performed and proved. Finally, the influence of both residual and specially added ILs quantities upon the properties of obtained polymer materials was investigated. It was revealed that ILs can physically interact with polymer networks increasing their thermal stability, plasticizing films, and blocks, imparting ionic conductivity equal up to 3.62 × 10 -3 Sm/cm at 25 °C.
Copper(II) triflate as a source of triflic acid: effective, green catalysis of hydroalkoxylation reactions
Tschan, Mathieu J.-L.,Thomas, Christophe M.,Strub, Henri,Carpentier, Jean-Francois
experimental part, p. 2496 - 2504 (2010/04/03)
The hydroalkoxylation of dicyclopentadiene (DCPD) and norbornene (NB) with 2-hydroxyethyl methacrylate (HEMA) for the synthesis of industrially relevant monomers has been investigated with various metal-based Lewis acids and strong Bronsted acids. In the
Synthesis of water-soluble polymethacrylates by living anionic polymerization of trialkylsilyl-protected oligo(ethylene glycol) methacrylates
Ishizone, Takashi,Han, Seok,Okuyama, Syunsuke,Nakahama, Seiichi
, p. 42 - 49 (2007/10/03)
2-[2-[(tert-Butyldimethylsilyl)oxy]ethoxy]ethyl methacrylate (2) and 2-[2-[2-[(tert-butyldimethylsilyl)oxy] ethoxy] ethoxy] ethyl methacrylate (3) were polymerized anionically in THF at -78 °C for 2-24 h. The anionic initiator systems included 1,1-diphenyl-3-methylpentyllithium/lithium chloride and diphenylmethylpotassium/diethylzinc. The polymerization of novel tert-butyldimethylsilyl-protected oligo(ethylene glycol) methacrylates, 2 and 3, proceeded quantitatively in each case. The resulting polymers possessed the predicted molecular weights based on the molar ratios of monomers to initiators, and narrow molecular weight distributions (Mw/Mn 1.1). The stability of the propagating carbanion of poly(2) and poly(3) was ascertained by the quantitative efficiencies of the sequential block copolymerizations using tert-butyl methacrylate (tBMA). Well-defined block copolymers, poly(2)-block-poly(tBMA) and poly(3)block-poly(tBMA), were obtained. The trialkylsilyl protecting groups of poly(2) and poly(3) were quantitatively hydrolyzed using 2 N HC1 in aqueous THF at 0 °C for 2 h to give tailored poly[di(ethylene glycol) methacrylate] and poly[tri(ethylene glycol) methacrylate], respectively. Both polymethacrylates obtained after deprotection were readily soluble in water due to the high polarity of the hydrophilic oligo(ethylene glycol) pendant units with terminal OH functionality.