33795-49-2Relevant academic research and scientific papers
Polymerized ionic liquid diblock copolymers with long alkyl side-chain length
Nykaza, Jacob R.,Ye, Yuesheng,Elabd, Yossef A.
, p. 3360 - 3369 (2014)
A polymerized ionic liquid (PIL) diblock copolymer with a long alkyl side-chain, poly(MMA-b-MUBIm-Br), was synthesized at various compositions from an ionic liquid monomer, (1-[(2-methacryloyloxy)undecyl]-3-butylimidazolium bromide) (MUBIm-Br), and a non-ionic monomer, methyl methacrylate (MMA). The PIL diblock copolymer was synthesized via post-functionalization from its non-ionic precursor PIL diblock copolymer, poly(MMA-b-BrUMA) (BrUMA = 11-bromoundecyl methacrylate), which was synthesized via the reverse addition fragmentation chain transfer (RAFT) polymerization technique. Differential scanning calorimetry reveals two distinct constant glass transition temperatures (T gs) with a low PIL segment Tg. These PIL block copolymers result in easily processable, flexible, transparent films with high mechanical strength. A high bromide ion conductivity of 64.85 mS cm-1 at 80 °C and 90% RH was measured for the PIL diblock copolymer with an ion exchange capacity (IEC) of 1.44 meq/g (23.3 mol% MUBIm-Br). Interestingly, this result was three times higher than its analogous PIL homopolymer (2.75 meq/g; 100 mol% MUBIm-Br) and an order of magnitude higher than a PIL block copolymer from a previous study with similar chemistry, similar IEC, higher water content, but shorter alkyl side-chain length. Ion conductivity did not scale as expected with water content, which is unusual for water-assisted ion transport (e.g., protons, hydroxide, chloride) in ion-containing polymers, and therefore suggests other mechanisms that impact ion transport in PIL block copolymers.
A highly efficient preparation of methacrylate esters using novel solid phase titanium-based transesterification catalysts
Lewis, Norman,Ribas, Christina,Wells, Andrew
, p. 957 - 959 (1999)
Highly active transesterification catalysts for the synthesis of sensitive methacrylate monomers can be conveniently prepared by reacting chlorotriisopropoxy titanium with cross-linked polystyrene beads functionalised with acetyl acetone or polyethylene glycol ligands.
Multicomponent hybrids with surfactant-encapsulated europium polyoxometalate covalently bonded ZnO and tunable luminescence
Yan, Bing,Shao, Yan-Fei
, p. 3318 - 3325 (2014)
In this paper, europium polyoxometalate (Na9EuW 10O36·32H2O, abbreviated as POM) is encapsulated into the surfactant dodecyl(11-(methacryloyloxy)undecyl) dimethylammonium bromide (DMDA) to form surfactant-encapsulated polyoxometalate (SEP). Methacrylic group-modified ZnO nanoparticles (designated ZnO-MAA) are also prepared through a sol-gel reaction between zinc methacrylate and LiOH. Finally, the synthesized SEP, ZnO-MAA and three different ester units (ethyl methacrylate (EMA), 2-hydroxyethyl methacrylate (HEMA) and 2,2,3,4,4,4- hexafluorobutyl methacrylate (HFMA)) are covalently bonded through a copolymerization reaction in the presence of benzoyl peroxide (BPO). A detailed physical characterization and especially the photoluminescence of these hybrid materials are studied in detail. The results provide a method to assemble multicomponent hybrid materials with europium polyoxometalate, a semiconductor compound and polymer unit, whose luminescence can be tuned and integrated.
Polymerization of wormlike micelles induced by hydrotropic salt
Liu, Shiyong,Gonzalez, Yamaira I.,Danino, Dganit,Kaler, Eric W.
, p. 2482 - 2491 (2005)
Addition of the hydrotropic salt sodium tosylate (TSNa) to solutions of a polymerizable cationic surfactant, methacryloyloxyundecyltrimethylammonium bromide (MUTB), leads to a transition from spherical to wormlike micelles about 40 nm in length. The wormlike micelles were successfully polymerized to yield stable, single-phase solutions of polymerized micelles. The polymerized wormlike micelles were several hundred nanometers long, although their cross-sectional radius remained unchanged (～2 nm). The spherical to wormlike micelle transition, and the wormlike micelles polymerized at different molar ratios of TSNa to MUTB, were characterized using quasi-elastic and static light scattering, small-angle neutron scattering, NMR, and cryogenic transmission electron microscopy.
Impact of counterions on micelle formation and polymerization of 11-acryloyloxyundecyltrimethylammonium surfactants
Bilibin, A. Yu,Fetin, P. A.,Fetina, V. I.,Lezov, A. A.,Zorin, I. M.
, (2020/04/20)
New surfactants based on the cationic monomer 11-acryloyloxyundecyltrimethylammonium with counterions bromide, nitrate, acetate, camphorsulfonate, 4-toluenesulfonate, trifluoroacetate were obtained in this work. In most cases counterions change the critical micelle concentration by 2–3 times (being compared with bromide) except sample with acetate counterions (in this case critical micelle concentration increases by an order of magnitude). Substitution of bromide for hydrophobic counterions (toluenesulfonate, trifluoroacetate, camphorsulfonate) does not lead to expected transformation of spherical micelles to long wormlike micelles. The polymerization of such monomers occurs according to the microemulsion mechanism involving micelles of monomers.
POLYMERIZABLE COMPOUNDS WITH ONE OR MORE SURFACTANT-LIKE PROPERTIES
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Paragraph 0029; 0030; 0033, (2019/02/15)
Some embodiments of the present disclosure relate to polymerizable compounds that comprise biocidal activity and/or the potential for increased biocidal activity and that comprise at least one hydrophobic portion and at least one hydrophilic portion. Together the hydrophobic portion and the hydrophilic portion of the compounds may provide the polymerizable compounds with one or more surfactant-like properties. The polymerizable compounds can be incorporated into polymer coating formulations. The polymer coating formulations can be used to coat one or more surfaces of a substrate. The coating formulation can provide biocidal activity and/or the potential for increased biocidal activity to the coated substrate-surface.
N-heterocyclic carbenes as versatile nucleophilic catalysts for transesterification/acylation reactions
Grasa, Gabriela A.,Kissling, Rebecca M.,Nolan, Steven P.
, p. 3583 - 3586 (2007/10/03)
(graph presented) Imidazol-2-ylidenes, a family of N-heterocyclic carbones (NHC), are efficient catalysts in the transesterification between esters and alcohols. Low catalyst loadings of aryl-or alkyl-substituted NHC catalysts mediate the acylation of alcohols with vinyl acetate in convenient reaction times at room temperature. Commercially available and more difficult to cleave methyl esters react with numerous alcohols in the presence of alkyl-substituted NHC to form efficiently the corresponding esters in very short reaction times.
Convenient preparation of functionalised polymer-based resins via an economical preparation of chloromethylated polystyrene resins (Merrifield type)
Le Carre, Erica,Lewis, Norman,Ribas, Christina,Wells, Andrew
, p. 606 - 610 (2013/08/07)
Initial studies on the preparation of cheap polymers suitable for the preparation of solid-supported metal catalysts and as solid supports for amino acids are described. The starting chloromethylated polystyrene resins (Merrifield type) were prepared usin
