Electrode modified with ionic liquid covalently bonded to silicate matrix for accumulation of electroactive anions

2007 ◽  
Vol 9 (10) ◽  
pp. 2580-2584 ◽  
Author(s):  
Adam Lesniewski ◽  
Joanna Niedziolka ◽  
Barbara Palys ◽  
Cecile Rizzi ◽  
Laurent Gaillon ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Silicate Matrix ◽  
Covalently Bonded ◽  
Electroactive Anions

Synthesis of Microcrystalline Cellulose Grafting Poly (methyl methacrylate) Copolymers by ATRP in 1-Allyl-3-Methylimidazolium Chloride

2012 ◽  
Vol 621 ◽  
pp. 157-161 ◽  
Author(s):  
Er Jun Tang ◽  
Miao Yuan ◽  
Liang Li ◽  
Feng Bian ◽  
Di Shun Zhao
Keyword(s):  
Molecular Weight ◽  
Ionic Liquid ◽  
Methyl Methacrylate ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
1H Nmr ◽  
Microcrystalline Cellulose ◽  
Methacrylate Copolymers ◽  
Covalently Bonded ◽  
Ft Ir

The microcrystalline cellulose grafting polymethylmethacrylate (MCC-g-PMMA) copolymer was successfully synthesized by atom transfer radical polymerization (ATRP) using ethanediamine as ligand in Ionic liquid 1-allyl-3-methylimidazolium chloride ([AMIM]Cl). The MCC-g-PMMA was characterized by FT-IR, 1H NMR, SEM and GPC spectroscopies. The results confirmed that the PMMA had been covalently bonded to cellulose backbone. The molecular weight of graft copolymers linearly increased during the polymerization and presented a low polydispersity.

Covalently bonded double-charged ionic liquid on magnetic graphene oxide as a novel, efficient, magnetically separable and reusable sorbent for extraction of heavy metals from medicine capsules

RSC Advances ◽  
2016 ◽  
Vol 6 (93) ◽  
pp. 90360-90370 ◽  
Author(s):  
Zahra Lotfi ◽  
Hassan Zavvar Mousavi ◽  
S. Maryam Sajjadi
Keyword(s):  
Heavy Metals ◽  
Ionic Liquid ◽  
Graphene Oxide ◽  
Magnetic Graphene Oxide ◽  
Magnetic Graphene ◽  
Covalently Bonded ◽  
Magnetically Separable

Development of a new SPE sorbent with a chemically bonded double-charged ionic liquid on magnetic graphene oxide to solve the disadvantages of ionic liquid based SPE methods.

Determination of volatile compounds in cider apple juices using a covalently bonded ionic liquid coating as the stationary phase in gas chromatography

2017 ◽  
Vol 409 (11) ◽  
pp. 3033-3041 ◽  
Author(s):  
Jairo Pello-Palma ◽  
Jaime González-Álvarez ◽  
María Dolores Gutiérrez-Álvarez ◽  
Enrique Dapena de la Fuente ◽  
Juan José Mangas-Alonso ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Ionic Liquid ◽  
Stationary Phase ◽  
Volatile Compounds ◽  
Covalently Bonded

Morphological studies of linear (AB)n multiblock copolymers and their blends

1992 ◽  
Vol 50 (1) ◽  
pp. 384-385
Author(s):  
Richard J. Spontak ◽  
Steven D. Smith ◽  
Arman Ashraf
Keyword(s):  
Electron Microscopy ◽  
Microphase Separation ◽  
Multiblock Copolymers ◽  
First Order ◽  
Morphological Studies ◽  
Transmission Electron ◽  
First Order Phase Transition ◽  
Covalently Bonded ◽  
Total Molecular Weight ◽  
First Order Phase

Block copolymers are composed of sequences of dissimilar chemical moieties covalently bonded together. If the block lengths of each component are sufficiently long and the blocks are thermodynamically incompatible, these materials are capable of undergoing microphase separation, a weak first-order phase transition which results in the formation of an ordered microstructural network. Most efforts designed to elucidate the phase and configurational behavior in these copolymers have focused on the simple AB and ABA designs. Few studies have thus far targeted the perfectly-alternating multiblock (AB)n architecture. In this work, two series of neat (AB)n copolymers have been synthesized from styrene and isoprene monomers at a composition of 50 wt% polystyrene (PS). In Set I, the total molecular weight is held constant while the number of AB block pairs (n) is increased from one to four (which results in shorter blocks). Set II consists of materials in which the block lengths are held constant and n is varied again from one to four (which results in longer chains). Transmission electron microscopy (TEM) has been employed here to investigate the morphologies and phase behavior of these materials and their blends.

Morphological behavior of compatibilized ternary blends prepared by mechanical mixing

1993 ◽  
Vol 51 ◽  
pp. 1200-1201
Author(s):  
S.D. Smith ◽  
R.J. Spontak ◽  
D.H. Melik ◽  
S.M. Buehler ◽  
K.M. Kerr ◽  
...  
Keyword(s):  
Interfacial Adhesion ◽  
Diblock Copolymers ◽  
Ternary Blends ◽  
Mechanical Mixing ◽  
Design Considerations ◽  
Covalently Bonded ◽  
Homopolymer Blends ◽  
Emulsifying Agent ◽  
Surface Active ◽  
Low Entropy

When blended together, homopolymers A and B will normally macrophase-separate into relatively large (≫1 μm) A-rich and B-rich phases, between which exists poor interfacial adhesion, due to a low entropy of mixing. The size scale of phase separation in such a blend can be reduced, and the extent of interfacial A-B contact and entanglement enhanced, via addition of an emulsifying agent such as an AB diblock copolymer. Diblock copolymers consist of a long sequence of A monomers covalently bonded to a long sequence of B monomers. These materials are surface-active and decrease interfacial tension between immiscible phases much in the same way as do small-molecule surfactants. Previous studies have clearly demonstrated the utility of block copolymers in compatibilizing homopolymer blends and enhancing blend properties such as fracture toughness. It is now recognized that optimization of emulsified ternary blends relies upon design considerations such as sufficient block penetration into a macrophase (to avoid block slip) and prevention of a copolymer multilayer at the A-B interface (to avoid intralayer failure).

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