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441 Newest Publications about the topic propylene oxide

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Key Performance Indicators Reveal the Impact of Demulsifier Characteristics on Oil Sands Froth Treatment

22-Feb-2017 | Ishpinder Kailey, Energy & Fuels, 2017

Demulsification with ethylene oxide (EO)-propylene oxide (PO) block copolymers is a very effective technique for treating water-in-oil emulsions in the petroleum industry. In this work, two series (A and B) of EO-PO block copolymers were synthesized and studied. The demulsifiers were defined by ...

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Rediscovering the Isospecific Ring-Opening Polymerization of Racemic Propylene Oxide with Dibutylmagnesium

20-Jan-2017 | Swarup Ghosh; Henrik Lund; Haijun Jiao; Esteban Mejía, Macromolecules, 2017

Macromolecules DOI: 10.1021/acs.macromol.6b01830

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Single, Janus, and Cerberus emulsions from the vibrational emulsification of oils with significant mutual solubility

18-Jan-2017 | Lingling Ge; Jingjing Li; Songtao Zhong; Yue Sun; Stig E. Friberg; Rong Guo, Soft Matter, 2017

Single, Janus, and Cerberus emulsions are prepared in one system consisting of three oils: silicone (SO), fluorocarbon (FO) and ethoxylated trimethylolpropane triacrylate (ETPTA) with mutual solubility. An aqueous solution of Pluronic F127, which is an poly(ethylene oxide)/poly(propylene oxide) ...

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Critical Conditions for Liquid Chromatography of Statistical Copolymers: Functionality Type and Composition Distribution Characterization by UP-LCCC/ESI-MS

10-Jan-2017 | Ruben Epping; Ulrich Panne; Jana Falkenhagen, Analytical Chemistry, 2017

Statistical ethylene oxide (EO) and propylene oxide (PO) copolymers of different monomer compositions and different average molar masses additionally containing two kinds of end groups (FTD) were investigated by ultra high pressure liquid chromatography under critical conditions (UP-LCCC) ...

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Stereoselective Total Synthesis of (-)-Pyrenophorin

04-Jan-2017 | Ramakrishna, Kolluri; Sreenivasulu, Reddymasu; Vidavalur, Siddaiah; Jagan Mohan Reddy, Boggu, Letters in Organic Chemistry, 2017

Abstract: Background: Homo and hetero dimers of macrodilacto cyclic compounds were observed frequently in nature and they were built with different types of functional groups, chemical skeletons and ring sizes. Natural products with macrodiolide frameworks are also known to exhibit a wide ...

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Amphiphilic Nanoparticle-in-Nanoparticle Drug Delivery Systems Exhibiting Cross-Linked Inorganic Rate-Controlling Domains

04-Jan-2017 | Julia Talal; Inbal Abutbul-Ionita; Inbar Schlachet; Dganit Danino; Alejandro Sosnik, Chemistry of Materials, 2017

Aiming to explore the potential of sol–gel chemistry to physically stabilize polymeric micelles and confer sustained release features, this work reports for the first time on the production of hybrid organic–inorganic multimicellar nanomaterials that, as opposed to the state-of-the-art materials, ...

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Coupling Reactions of Carbon Dioxide with Epoxides Catalyzed by Vanadium Aminophenolate Complexes

03-Jan-2017 | Francesca Maria Kerton, Ali Issa Elkurtehi, ChemSusChem, 2017

A series of vanadium compounds supported by tetradentate amino‐bis(phenolate) ligands were screened for catalytic reactivity in the reaction of propylene oxide (PO) with carbon dioxide, [VO(OMe)(O2NOBuMeMeth)] (1), [VO(OMe)(ON2OBuMe)] (2), [VO(OMe)(O2NNBuBuPy)] (3), and [VO(OMe)(O2NOBuBuFurf)] ...

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Rh(0)/Rh(III) core–shell nanoparticles as heterogeneous catalysts for cyclic carbonate synthesis

29-Dec-2016 | Younjae Jung; Taeil Shin; Kiseong Kim; Hyeeun Byun; Sung June Cho; Hyunwoo Kim; Hyunjoon Song, Chemical Communication, 2016

Rh(0)/Rh(iii) core–shell nanoparticles were prepared by surface oxidation of Rh nanoparticles with N-bromosuccinimide. They were employed as heterogeneous catalysts for cyclic carbonate synthesis from propylene oxide and CO2, and exhibited high activity and excellent recyclability due to Lewis ...

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A one‐step strategy for aliphatic poly(carbonate‐ester)s with high performance derived from CO2, propylene oxide and l‐lactide

06-Dec-2016 | Pengfei Song, Haidong Xu, Xudong Mao, Xiaojun Liu, Lei Wang, Polymers for Advanced Technologies, 2016

To improve the performance of PPC, aliphatic poly(carbonate‐ester)s were prepared in one‐step strategy from the terpolymerization of CO2, propylene oxide (PO), and l‐lactide (L‐LA) catalyzed by zinc glutarate. Consequently giving high‐molecular weight terpolymers (PPCLAs) in a very high yield ...

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Glycidol: an Hydroxyl‐Containing Epoxide Playing the Double Role of Substrate and Catalyst for CO2 Cycloaddition Reactions

21-Nov-2016 | Francesco Della Monica, Antonio Buonerba, Alfonso Grassi, Carmine Capacchione, Stefano Milione, ChemSusChem, 2016

Abstract Glycidol is converted into glycerol carbonate (GC) by coupling with CO2 in the presence of tetrabutylammonium bromide (TBAB) under mild reaction conditions (T=60 °C, P =1 MPa) in excellent yields (99 %) and short reaction time (t=3 h). The unusual reactivity of this substrate compared ...

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