Controlled oxyanionic polymerization of propylene oxide: unlocking the molecular-weight limitation by a soft nucleophilic catalysis.
Sign Up to like & getrecommendations! Published in 2022 at "Macromolecular rapid communications"
DOI: 10.1002/marc.202200424
Abstract: The oxyanionic ring-opening polymerization of propylene oxide (PO) from an exogenous alcohol activated with benign (complexed) metal-alkali carboxylates is described. We demonstrate that the equimolar mixture of potassium acetate (KOAc) and 18-crown-6 ether (18C6) is… read more here.
Keywords: oxyanionic polymerization; propylene oxide; polymerization propylene; controlled oxyanionic ... See more keywords
Composite Ionic Liquids Immobilized on MCM-22 as Efficient Catalysts for the Cycloaddition Reaction with CO2 and Propylene Oxide
Sign Up to like & getrecommendations! Published in 2017 at "Catalysis Letters"
DOI: 10.1007/s10562-017-2137-y
Abstract: Ionic liquids (ILs) have shown predominant catalytic activity in the field of catalytic conversion of CO2. Unfortunately, ILs catalysts can be only used in kettle catalysis as homogeneous systems, which suffered from the difficulty in… read more here.
Keywords: composite ionic; co2; reaction; propylene oxide ... See more keywords
Ag-(Mo-W)/ZrO2 catalysts for the production of propylene oxide: Effect of pH in the preparation of ZrO2 support
Sign Up to like & getrecommendations! Published in 2018 at "Catalysis Communications"
DOI: 10.1016/j.catcom.2018.04.005
Abstract: Abstract Direct oxidation of propylene to propylene oxide was carried out over Ag-(Mo-W)/ZrO2 (pH X) catalysts prepared by changing the pH of Zr precursor solution from 3 to 14 while preparing the ZrO2 support. It… read more here.
Keywords: zro2 support; propylene oxide; zro2 catalysts; zro2 ... See more keywords
Amine-oxide hybrid materials in combination with cobalt for the catalyzed cycloaddition of carbon dioxide and propylene oxide
Sign Up to like & getrecommendations! Published in 2020 at "Catalysis Today"
DOI: 10.1016/j.cattod.2020.03.013
Abstract: Abstract Amine-oxide materials synthesized starting from small silica particles and porous silica in combination with polyethyleneimine have been prepared by co-condensation. The materials showing different surface areas and porosity were attained for M2 and M3… read more here.
Keywords: combination; cycloaddition; cobalt; amine oxide ... See more keywords
Study on the reaction mechanism of the propylene oxide rearrangement via in-situ DRIFTS
Sign Up to like & getrecommendations! Published in 2017 at "Chemical Engineering Journal"
DOI: 10.1016/j.cej.2016.09.035
Abstract: Abstract In this paper, the in situ DRIFTS technology was employed to study the adsorption and reaction behavior of propylene oxide on different substances at different temperatures. And the adsorption behavior of the products at… read more here.
Keywords: propylene oxide; situ drifts; oxide rearrangement; reaction ... See more keywords
Determination of zinc glutarate complexes synthesis factors affecting production of propylene carbonate from carbon dioxide and propylene oxide
Sign Up to like & getrecommendations! Published in 2017 at "Chemical Engineering Journal"
DOI: 10.1016/j.cej.2017.06.075
Abstract: Abstract The purpose of this research was to investigate the effects of catalyst preparation temperature and time, and catalyst size in relation to the performance of the zinc glutarate (ZnGA) catalyst and the polypropylene carbonate… read more here.
Keywords: catalyst; temperature; zinc glutarate; propylene oxide ... See more keywords
N-Heterocyclic carbene/Lewis acid-mediated ring-opening polymerization of propylene oxide. Part 1: Triisobutylaluminum as an efficient controlling agent
Sign Up to like & getrecommendations! Published in 2020 at "European Polymer Journal"
DOI: 10.1016/j.eurpolymj.2020.109819
Abstract: Abstract Ring-opening polymerization (ROP) of propylene oxide (PO) is achieved at 25 °C either in bulk or in solution, using N-heterocyclic carbenes (NHCs) and triisobutylaluminum (i-Bu3Al) as a bicomponent catalytic system. Transfer to monomer was not… read more here.
Keywords: ring opening; lewis acid; polymerization; opening polymerization ... See more keywords
Metal N,N-dialkylcarbamates as easily available catalytic precursors for the carbon dioxide/propylene oxide coupling under ambient conditions
Sign Up to like & getrecommendations! Published in 2018 at "Journal of CO2 Utilization"
DOI: 10.1016/j.jcou.2018.09.023
Abstract: Abstract A series of previously reported homoleptic and non-homoleptic N,N-dialkylcarbamates of a range of non precious metals and N,N-dialkylcarbamate of Al(III) were investigated as easily available and inexpensive catalysts in the solventless synthesis of propylene… read more here.
Keywords: available catalytic; dialkylcarbamates easily; easily available; catalytic precursors ... See more keywords
Influence of head-group composition and (chloro)propoxy units disposition consequency on properties of surfactants based on lauric acid, propylene oxide, epichlorohydrin and ethanolamines
Sign Up to like & getrecommendations! Published in 2018 at "Materials Chemistry and Physics"
DOI: 10.1016/j.matchemphys.2017.11.035
Abstract: Abstract Nonionic surfactants were synthesized by interaction of lauric acid (LA) with propylene oxide (PO) and epichlorohydrin (ECH). The synthesis was conducted in two directions. In the first way, initially, ester of LA with PO… read more here.
Keywords: disposition consequency; oxide epichlorohydrin; acid propylene; lauric acid ... See more keywords
Multifunctional alkanolamine as a catalyst for CO2 and propylene oxide cycloaddition
Sign Up to like & getrecommendations! Published in 2017 at "Molecular Catalysis"
DOI: 10.1016/j.mcat.2017.05.026
Abstract: Abstract Multifunctional alkanolamines without metals or halides were designed as catalysts for the synthesis of propylene carbonate (PC) by the cycloaddition of CO2 and propylene oxide (PO). New catalysts were synthesized in a one-step, low-temperature… read more here.
Keywords: cycloaddition; multifunctional alkanolamine; co2 propylene; propylene oxide ... See more keywords
Toughening poly(lactic acid) with poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymers
Sign Up to like & getrecommendations! Published in 2018 at "Polymer"
DOI: 10.1016/j.polymer.2018.09.027
Abstract: Abstract This study describes the toughening of poly(lactic acid) (PLA) through blending it with poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) triblock copolymers (EPE, Pluronic®) at loadings less than 10 wt%. The miscibility of EPE copolymers in PLA was… read more here.
Keywords: poly propylene; ethylene oxide; poly ethylene; propylene oxide ... See more keywords