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Br?nsted Guanidine Acid-Base Ionic Liquids Novel Reaction Media for the Palladium-Catalyzed Heck Reaction
关键字：Ionic liquids, Heck reaction, guanidine
Br?nsted acid?base ionic liquids (GILs) based on guanidine and acetic acid are efficient reaction media for palladium-catalyzed Heck reactions. They offer the advantages of high activity and reusability. GIL2 plays multiple roles in the reaction: it could act as solvent, as a strong base to facilitate a-hydride elimination, and as a ligand to stabilize activated Pd species.
http://www.polymer.cn/research/sy_info19385 |
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Preparation and Representation of Phase Change Double Network Fiber
关键字：acrylic acid polyethylene glycol ester phase transition the dual network calcium alginate fiber
Abstract: This paper proceeds as follow: taken polyethylene glycol acrylate, N,N-methylene
acrylamide as phase change material, alginic acid fibers as fiber structure, phase change dual
network fiber can be prepared by adopting wet-spinning method. Structure and performance of
phase-change dual network fiber can be showed by using differential scanningcalorimeter (DSC),
thermogravimetric analyzer...
http://www.polymer.cn/research/sy_info18926 |
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Determination of molecular weight of polyethylene glycol using size-exclusion chromatography with multi-angle laser lightscattering and acid–base titration
关键字：polyethylene glycol
Size-exclusion chromatography with multi-angle laser light scattering (SEC-MALLS) and
acid–base titration were used to determine the molecular weight of a polyethylene glycol
with low molecular weight. All potential uncertainty factors for each measurement were
evaluated using cause-effect diagrams. Weight analysis was applied to harmonize the two
different measurement results. It was fo...
http://www.polymer.cn/research/sy_info14793 |
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Preparation and Representation of Phase Change Double Network Fiber
关键字：acrylic acid polyethylene glycol ester phase transition the dual network calcium alginate fiber
Abstract: This paper proceeds as follow: taken polyethylene glycol acrylate, N,N-methylene
acrylamide as phase change material, alginic acid fibers as fiber structure, phase change dual
network fiber can be prepared by adopting wet-spinning method. Structure and performance of
phase-change dual network fiber can be showed by using differential scanningcalorimeter (DSC),
thermogravimetric analyzer...
http://www.polymer.cn/research/dis_info18960 |
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Folate-chitosan Modified Alginate/CaC03 Hybrid Nanoparticles for Tumor-targeted Drug Delivery
关键字：folic acid, targeted drug delivery, calcium carbonate, nanoparticles
Folic acid(FA)is a targeting group which is extensively used to deliver therapeutic and imaging agents to folate receptor (FR) over expressed cancer cells. In this study, the alginate/calcium carbonate(alginate/CaC03) hybrid n...
http://www.polymer.cn/research/dis_info17336 |
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Flow-induced Morphologies of Poly(lactic acid) and Ramie Fibers in Injection-molded Biocomposites
关键字：pla, natural fiber, renewable biocomposites, morphology, performance
The poly (lactic acid) (PLA)/ramie fiber biocomposites were fabricated by extrusion compounding followed by injection molding, and further attempts were made to understand the flow-induced morphology of ramie fibers and PLA&nb...
http://www.polymer.cn/research/dis_info17300 |
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Thermal and Mechanical Properties of Film Sheet from PLA/ENR Blends using Rutile Ti02 as Fillers
关键字：poly(lactic acid) , epoxidized natural rubber, titanium dioxide
The aim of this research was to reduce the brittle and increase the toughness of polylactic acid (PLA) by adding epoxidized natural rubber (ENR)01]. ENR with epoxidation content of 33mol% was mixed in chloroform...
http://www.polymer.cn/research/dis_info17281 |
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Oil-in-water emulsions stabilized by photo-sensitive coumarin-grafted hyaluronic acid derivative micelle nanoparticles
关键字：Hyaluronan, Coumarin，Photo-sensitive，Self-assembly，ickering emulsions
Photo-sensitive coumarin-grafted hyaluronic acid derivative (HA-g-C) was synthesized with the solubilization method of HA in anhydrous DMSO by nano-complexing with dimethoxy-PEG.
http://www.polymer.cn/research/dis_info15656 |
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Study on mechanical property and hydrophilicity of PLLA/PEG degradable anti-adhesion membrane prepared by electrospinning
关键字：electrospinning; poly(L-lactic acid); polyethylene glycol; anti-adhension membrane
In this study, poly(L-lactic acid) (PLLA) / polyethylene glycol (PEG) blend fibers have been prepared by electrospinning using chloroform and absolute ethyl alcohol as solvents. and several anti-adhesion membranes in different blend ratios&...
http://www.polymer.cn/research/dis_info14075 |
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NEW GENERATION OF CHITOSAN-(ACRYLIC ACID)-MAGNETITE NANOSPHERES: SYNTHESIS, CHARACTERIZATION AND CELL VIABILITY TEST IN VITRO
关键字：chitosan, magnetite, nanospheres. cell viability
A facile approach to a new generation of chitosan-(acrylic acid)-magnetite nanospheres (CS-AA-Fe3O4) was demonstrated. TEM morphology indicated that magnetite nanoparticles (diameter about 20 nm) were embedded in CS-AA-Fe3O4 nanospheres (130nm). Sign...
http://www.polymer.cn/research/dis_info13898 |
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