Studies on the melt copolymerization of phosphorus-containing diacid and bis(p-carboxyphenoxy) propand for DDS

1997 ◽  
Vol 2 (3) ◽  
pp. 332-332
Author(s):  
Fu Jie ◽  
Zhuo Renxi ◽  
Fan Changlie
Keyword(s):  
Phosphorus Containing ◽  
Melt Copolymerization

MACHINERY OPERATIONAL PROPERTY CONTROL DURING DIAMOND-ABRASIVE FINISHING USING ACTIVE SOTS

2020 ◽  
Vol 2020 (9) ◽  
pp. 13-17
Author(s):  
Yuriy Ryzhov ◽  
Svetlana Abramova
Keyword(s):  
Corrosion Inhibitors ◽  
Tribological Behavior ◽  
Surface Layers ◽  
Physical Chemical ◽  
Abrasive Finishing ◽  
Alloying Additives ◽  
Phosphorus Containing ◽  
Micro Emulsion ◽  
Property Control ◽  
Diamond Abrasive

There is carried out a number of experiments with the purpose of analyzing SOTS impact upon both finishing productivity, and physical-chemical state and tribological behavior of surfaces machined, and also a possibility for creation according to the results of the investigations carried out a relatively universal micro-emulsion SOTS based on existing in the Ukraine the line of oils, PAV, corrosion inhibitors, alloying additives etc. As SOTS samples there were used both well-known compouds, for example, Camix, Nope Right (USA), and carbamide having in its structure boron, boron-phosphorus-containing additive, water-solvable phosphate, tributyl phosphate (oil-solvable), concentrate SOTS tribol, having in its structure compounds of boron, nitrogen and phosphorous; ethylic ether of fatty acids; methyl ether of colza oil; Sarkozyl-O having in its structure easily-decomposable chlorine compounds. From the results obtained it is possible to draw a conclusion that during finishing in the environment of water-compatible SOTS an important role in the formation of the properties of the surface worked is played by hydrocarbon components and additives which contribute to the formation of the thinnest surface layers modified with carbon and oxygen.

Validation of a Generation 4 Phosphorus-Containing Polycationic Dendrimer for Gene Delivery Against HIV-1

2012 ◽  
Vol 19 (29) ◽  
pp. 5044-5051 ◽  
Author(s):  
V. Briz ◽  
M.J. Serramia ◽  
R. Madrid ◽  
A. Hameau ◽  
Anne-Marie Caminade ◽  
...  
Keyword(s):  
Gene Delivery ◽  
Phosphorus Containing ◽  
Hiv 1

scholarly journals The Preparation, Thermal Properties, and Fire Property of a Phosphorus-Containing Flame-Retardant Styrene Copolymer

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 127 ◽  
Author(s):  
Yu Sun ◽  
Yazhen Wang ◽  
Li Liu ◽  
Tianyuan Xiao
Keyword(s):  
Thermal Properties ◽  
Thermogravimetric Analysis ◽  
Flame Retardant ◽  
Oxygen Index ◽  
Limiting Oxygen Index ◽  
Chemical Structures ◽  
1H Nuclear Magnetic Resonance ◽  
Phosphorus Containing ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

A 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) acrylate, (6-oxidodibenzo [c,e][1,2] oxaphosphinin-6-yl) methyl acrylate (DOPOAA), has been prepared. Copolymers of styrene (St) and DOPOAA were prepared by emulsion polymerization. The chemical structures of copolymers containing levels of DOPOAA were verified using Fourier transform infrared (FT-IR) spectroscopy and 1H nuclear magnetic resonance (1H-NMR) spectroscopy. The thermal properties and flame-retardant behaviors of DOPO-containing monomers and copolymers were observed using thermogravimetric analysis and micro calorimetry tests. From thermogravimetric analysis (TGA), it was found out that the T5% for decomposition of the copolymer was lower than that of polystyrene (PS), but the residue at 700 °C was higher than that of PS. The results from micro calorimetry (MCC) tests indicated that the rate for the heat release of the copolymer combustion was lower than that for PS. The limiting oxygen index (LOI) for combustion of the copolymer rose with increasing levels of DOPOAA. These data indicate that copolymerization of the phosphorus-containing flame-retardant monomer, DOPOAA, into a PS segment can effectively improve the thermal stability and flame retardancy of the copolymer.

scholarly journals Synthesis of phosphorus-containing polyurethanes and poly(urethane-acrylate)s

2017 ◽  
Vol 41 ◽  
pp. 630-647 ◽  
Author(s):  
Mahir Burak SÜDEMEN ◽  
Hacer Ayşen ÖNEN
Keyword(s):  
Urethane Acrylate ◽  
Phosphorus Containing

ChemInform Abstract: PHOSPHORUS-CONTAINING SULFOXONIUM YLIDES. II. PROPERTIES OF YLIDES STABILIZED D BY PHOSPHORUS(V)

1978 ◽  
Vol 9 (44) ◽  
Author(s):  
V. P. LYSENKO ◽  
I. E. BOLDESKUL ◽  
R. A. LOKTIONOVA ◽  
YU. G. GOLOLOBOV
Keyword(s):  
Phosphorus Containing

DFT study of Raman spectra of phosphorus-containing dendrimers built from thiophosphoryl core

2013 ◽  
Vol 68 ◽  
pp. 61-70
Author(s):  
V.L. Furer ◽  
A.E. Vandyukov ◽  
J.P. Majoral ◽  
A.M. Caminade ◽  
V.I. Kovalenko
Keyword(s):  
Raman Spectra ◽  
Dft Study ◽  
Phosphorus Containing

ChemInform Abstract: SYNTHESIS AND PROPERTIES OF PHOSPHORUS-CONTAINING NITRONITRATES

1978 ◽  
Vol 9 (45) ◽  
Author(s):  
L. A. ZHIDKOVA ◽  
M. G. IVANOVA ◽  
G. M. BARANOV ◽  
V. V. PEREKALIN
Keyword(s):  
Phosphorus Containing

Phosphorus Containing Porous Organic Polymers: Synthetic Techniques and Applications in Organic Synthesis and Catalysis

2021 ◽  
Author(s):  
Pramod Kumar ◽  
Animesh Das ◽  
Biplab Maji
Keyword(s):  
Organic Synthesis ◽  
Homogeneous Catalysis ◽  
Heterogeneous Catalysts ◽  
Organic Polymer ◽  
Organic Polymers ◽  
Porous Organic Polymers ◽  
Porous Organic Polymer ◽  
Phosphorus Containing

The phosphorous-containing porous organic polymer is a trending material for the synthesis of heterogeneous catalysts. Decades of investigations have established phosphines as versatile ligands in homogeneous catalysis. Recently, phosphine-based heterogeneous...

scholarly journals Silver Nanoparticles Stabilized with Phosphorus-Containing Heterocyclic Surfactants: Synthesis, Physico-Chemical Properties, and Biological Activity Determination

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1883
Author(s):  
Martin Pisárčik ◽  
Miloš Lukáč ◽  
Josef Jampílek ◽  
František Bilka ◽  
Andrea Bilková ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Biological Activity ◽  
Zeta Potential ◽  
Chain Length ◽  
Alkyl Chain ◽  
Chemical Properties ◽  
Alkyl Chain Length ◽  
Microbial Pathogens ◽  
Physico Chemical ◽  
Phosphorus Containing

Phosphorus-containing heterocyclic cationic surfactants alkyldimethylphenylphospholium bromides with the alkyl chain length 14 to 18 carbon atoms were used for the stabilization of silver nanodispersions. Zeta potential of silver nanodispersions ranges from +35 to +70 mV, which indicates the formation of stable silver nanoparticles (AgNPs). Long-chain heptadecyl and octadecyl homologs of the surfactants series provided the most intensive stabilizing effect to AgNPs, resulting in high positive zeta potential values and smaller diameter of AgNPs in the range 50–60 nm. A comparison with non-heterocyclic alkyltrimethylphosphonium surfactants of the same alkyl chain length showed better stability and more positive zeta potential values for silver nanodispersions stabilized with heterocyclic phospholium surfactants. Investigations of biological activity of phospholium-capped AgNPs are represented by the studies of antimicrobial activity and cytotoxicity. While cytotoxicity results revealed an increased level of HepG2 cell growth inhibition as compared with the cytotoxicity level of silver-free surfactant solutions, no enhanced antimicrobial action of phospholium-capped AgNPs against microbial pathogens was observed. The comparison of cytotoxicity of AgNPs stabilized with various non-heterocyclic ammonium and phosphonium surfactants shows that AgNPs capped with heterocyclic alkyldimethylphenylphospholium and non-heterocyclic triphenyl-substituted phosphonium surfactants have the highest cytotoxicity among silver nanodispersions stabilized by the series of ammonium and phosphonium surfactants.

Sign in / Sign up

Export Citation Format

Share Document