- Synthesis of high molecular flexibility polycarbonates for solid polymer electrolytes
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A new self-plasticizing aliphatic polycarbonate comprising flexible alkyl and alkyl ether side groups was designed and synthesized from six-membered cyclic carbonate monomers with the aim of producing a material with high molecular flexibility (low Tg) and concomitant high ionic conductivity when used as a polymer electrolyte. The Tg of the novel polycarbonate was determined to be -49.4 °C at a molecular weight of 34 400 g mol-1, which is the lowest reported Tg to date for a substituted poly(trimethylene carbonate). UV-crosslinked polymer electrolytes were produced based on this novel material together with LiTFSI salt and showed ionic conductivities in the range of 2 × 10-8 to 2 × 10-7 S cm-1 at room temperature and 1 × 10-6 to 1 × 10-5 S cm-1 at 100 °C. The limited ionic conductivities of these electrolytes indicate that high molecular flexibility alone does not guarantee fast ion transport in solid polymer electrolytes and that other factors, such as the polarity of the polymer host material, will also influence the transport properties of the electrolyte.
- Mindemark, Jonas,Imholt, Laura,Brandell, Daniel
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- Synthesis of well-defined hydrogel networks using Click chemistry
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New PEG-based hydrogel materials have been synthesized by Click chemistry and shown to result in well-defined networks having significantly improved mechanical properties; the selectivity of the azide/acetylene coupling reaction also allows for the incorporation of various additives and functional groups leading to chemical tailoring of the hydrogels. The Royal Society of Chemistry 2006.
- Malkoch, Michael,Vestberg, Robert,Gupta, Nalini,Mespouille, Laetitia,Dubois, Philipe,Mason, Andrew F.,Hedrick, James L.,Liao, Qi,Frank, Curtis W.,Kingsbury, Kevin,Hawker, Craig J.
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- Reversible switching between linear and ring polystyrenes bearing porphyrin end groups
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A route to macrocyclic polymers based on a new unimolecular ring-closure process has been investigated. It involves the direct end-to-end coupling of an α,ω-bis[chloroiron(III) meso-tetraphenylporphyrin] telechelic linear polystyrene synthesized by living
- Schappacher, Michel,Deffieux, Alain
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- Preparation of fluorinated methacrylic copolymers by copper mediated living radical polymerization
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The synthesis of fluorinated macroinitiators and macromonomers for copper mediated living radical polymerization is reported. In a first approach, various fluorinated telomers showing one or two hydroxy groups are transformed into initiators via esterification. The resultant macroinitiators are used for the polymerization of methyl methacrylate (MMA) to give well-defined block copolymers. In a second approach, the same telomers were transformed into methacrylic monomers and subsequently polymerised using living radical polymerization. In both cases, the final products of polymerization show molecular weights close to expected, assuming living polymerization, with polydispersities of approximately 1.1-1.2.
- Perrier, Sébastien,Jackson, Stuart G,Haddleton, David M,Ameduri, Bruno,Boutevin, Bernard
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- SALT, ACID GENERATOR, RESIST COMPOSITION, AND METHOD FOR PRODUCING RESIST PATTERN
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PROBLEM TO BE SOLVED: To provide a salt and an acid generator with which a resist composition can be obtained, the resist composition being able to produce a resist pattern with good CD uniformity (CDU). SOLUTION: Provided are: a salt represented by formu
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Paragraph 0242
(2019/08/20)
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- Fluorene Derivative, Method for Producing the Same, Resin Composition, and Article
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A fluorene derivative represented by General Formula (1) below. [in-line-formulae]X1—Y—X2??General Formula (1)[/in-line-formulae] In the General Formula (1), X1 represents a cyclic carbonate group including a carbonate bon
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Paragraph 0158-0161
(2018/08/20)
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- Liquid crystal compound, liquid crystal composition, and liquid crystal display device
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A liquid crystal compound of formula (I): where A1, A2, A3, A4, R1, R2, Z1, Z2, Z3, n, and m are as defined in the specification.
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Page/Page column 13; 14
(2016/03/26)
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- LIQUID CRYSTAL COMPOUND, LIQUID CRYSTAL COMPOSITION, AND LIQUID CRYSTAL DISPLAY DEVICE
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A liquid crystal compound of formula (I): where A1, A2, A3, A4, R1, R2, Z1, Z2, Z3, n, and m are as defined in the specification.
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- NOVEL POLYMERIC PHOTOINITIATORS AND PHOTOINITIATOR MONOMERS
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The present invention provides polymeric photoinitiators being co-polymers of photoinitiator monomers and at least one further monomer, as well as photoinitiator monomers being intermediates in the preparation of such polymeric photoinitiators. Additionally, there is provided polyacrylate obtained by radical polymerization of at least one acrylate monomer (Ac) in the presence of such polymeric photoinitiators. In the photoinitiator monomers and polymeric photoinitiators, a photoinitiator moiety, a hydrolytic stable linker and two polymerisable functional groups are incorporated into the photoinitiator structure.
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Page/Page column
(2015/06/03)
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- Synthesis of a Difunctional Orthogonal Coupler for the Preparation of Carbohydrate-Functionalized sP(EO-stat-PO) Hydrogels
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The synthesis and characterization of a new difunctional coupler (4) based on trimethylolpropane (TMP) are described. The coupler is used to connect biologically active N-acetylglucosamine (GlcNAc) on amino-reactive microtiter plates and on star-shaped po
- Anders, Thorsten,Adamiak, Kathrin,Keul, Helmut,Elling, Lothar,Moeller, Martin
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scheme or table
p. 1201 - 1210
(2012/05/05)
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- Six-membered cyclic carbonate having styrene moiety as a chemically recyclable monomer. Construction of novel cross-linking-de-cross-linking system of network polymers
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This article deals with (1) synthesis and anionic polymerization of a six-membered cyclic carbonate having styrene moiety, (2) anionic depolymerization of the obtained polymer, (3) radical cross-linking of the obtained polymer, and (4) anionic de-cross-li
- Miyagawa, Toyoharu,Shimizu, Mie,Sanda, Fumio,Endo, Takeshi
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p. 7944 - 7949
(2008/02/03)
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- Facile cleavage of triethylsilyl (TES) ethers using o-lodoxybenzoic acid (IBX) without affecting tert-butyldimethylsilyl (TBS) ethers
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(matrix presented) In DMSO cleavage of triethylsilyl (TES) ethers by o-iodoxybenzoic acid (IBX) was significantly faster than cleavage of tert-butyldimethylsilyl (TBS) ethers or further oxidation into carbonyl compounds. In most cases, TES protecting groups be removed in good to excellent yields within 1 h, whereas similar TBS protecting groups remained intact under the same conditions. The procedure also could be adapted for direct one-pot conversion of TES ethers into carbonyl compounds.
- Wu, Yikang,Huang, Jia-Hui,Shen, Xin,Hu, Qi,Tang, Chao-Jun,Li, Liang
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p. 2141 - 2144
(2007/10/03)
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- Synthetic lubricating oil
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The present invention relates to a synthetic lubricating oil comprising cyclic ketals or cyclic acetals obtained by a reaction between one or more polyhydric alcohols having an even number of hydroxyl groups of not less than 4 and not more than 10 and one or more specific carbonyl compounds, or one or more ketals or acetals which are reactive derivatives of said carbonyl compounds; a working fluid composition for a refrigerating machine comprising a hydrofluorocarbon and a refrigeration oil containing the cyclic ketals or cyclic acetals; and novel compounds of the above cyclic acetals and a production method thereof. The present invention provides a synthetic lubricating oil which shows a good thermal stability, a good oxidation resistance, no carboxylic acid formation due to hydrolysis and a low hygroscopicity and is inexpensive as well. Also, a working fluid composition for a refrigerating machine which shows a good insulating property, favorable hygroscopicity, and no carboxylic acid formation due to hydrolysis as well as being inexpensive can be provided.
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- Polyfunctional compounds containing α-diazo-β-keto ester units and sulfonate units
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Polyfunctional compounds containing α-diazo-β-keto ester units and sulfonate units are disclosed. The polyfunctional compounds have high sensitivity in the deep UV and high thermal stability. Processes for producing the compounds are disclosed. A preferred process first synthesizes β-ketoester/sulfonate precursors and then uses diazo transfer to convert the precursors into the novel compounds. Radiation-sensitive mixtures containing the compounds are also disclosed.
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