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Polymer activity

Considerable research and development effort is being placed on a chlorine-resistant membrane that wiU maintain permeabUity and selectivity over considerable time periods (years). This polymer activity is not limited to hoUow fibers, but the thick assymetric skin of hoUow-fiber constmction might offer an advantage in resolving the end use need as opposed to the ultrathin dat-sheet composite membranes. [Pg.155]

Tseng et al. [164] suecessfully used UNIFAC to optimize polymer-solvent interactions in three-solvent systems, determining polymer activity as a function of the solvent eomposition. The composition yielding the minimum in polymer aetivity was taken as the eriterion for optimum interaetion, and it eompared well with experimental measurements of dissolution rate and solution clarity. Better agreement was obtained using UNIFAC than using solubility parameter methods. [Pg.63]

Predicting Polymer Activities in Polymer Solvent Binaries... [Pg.20]

Adsorption beds of activated carbon for the purification of citric acid, and adsorption of organic chemicals by charcoal or porous polymers, are good examples of ion-exchange adsorption systems. Synthetic resins such as styrene, divinylbenzene, acrylamide polymers activated carbon are porous media with total surface area of 450-1800 m2-g h There are a few well-known adsorption systems such as isothermal adsorption systems. The best known adsorption model is Langmuir isotherm adsorption. [Pg.185]

Polymer feed rates can be calculated based on a 1 1 stoichiometric ratio with FW hardness or total metals (Ca/Mg/Fe/Cu/Al/Ni). If, for example, a boiler operates at 950 psig, runs at 50 X COC, and is supplied with FW containing 0.05 ppm total metals, this may require 0.05 X 50 = 2.5 ppm polymer actives in the BW. [Pg.458]

At first glance, the HRC scheme appears simple the polymer is activated, dissolved, and then submitted to derivatization. hi a few cases, polymer activation and dissolution is achieved in a single step. This simplicity, however, is deceptive as can be deduced from the following experimental observations In many cases, provided that the ratio of derivatizing agent/AGU employed is stoichiometric, the targeted DS is not achieved the reaction conditions required (especially reaction temperature and time) depend on the structural characteristics of cellulose, especially its DP, purity (in terms of a-cellulose content), and Ic. Therefore, it is relevant to discuss the above-mentioned steps separately in order to understand their relative importance to ester formation, as well as the reasons for dependence of reaction conditions on cellulose structural features. [Pg.109]

A similar expression can be derived for the polymer activity (11). The formalism can also be extended to multicomponent solutions (11). [Pg.191]

There is a similar expression for polymer activity. However, if the fluid being sorbed by the polymer is a supercritical gas, it is most useful to use chemical potential for phase equilibrium calculations rather than activity. For example, at equilibrium between the fluid phase (gas) and polymer phase, the chemical potential of the gas in the fluid phase is equal to that in the liquid phase. An expression for the equality of chemical potentials is given by Cheng (12). [Pg.195]

Yamada, T., Sartor, R.B., Marshall, S. and Grisham, M.B. (1992). A chronic model of distal colitis induced by bacterial cell wall polymers activation of leukocyte nitric oxide synthesis. Gastroenterology 102, A715. [Pg.174]

Urethane linkages between amino groups of a protein and PEG provide a stable attachment, more resistant to hydrolytic cleavage (13). In fact, it was demonstrated on radioactively labeled PEG-derivatives that urethane links are completely stable under a variety of physiological conditions (14). The attachment of PEG to a protein via carbamate was obtained (15,16) using carbonyldiimidazole activated PEG. However, the polymer activated in this manner is not very reactive and therefore very long reaction times (48-72 h at pH 8.5) were required to achieve sufficient modifications. [Pg.94]

Three types of polymeric materials are used inert polymers, active polymers, and azide polymers. No exothermic heat is produced when inert polymers are decomposed thermally. On the other hand, exothermic reactions occur when active polymers and azide polymers are decomposed. Self-sustaining burning is possible when active polymers and azide polymers are ignited. [Pg.77]

Product trade name Polymer Active ingredient Indication... [Pg.349]

This lack of precise information on the level of polymer actives needed to achieve desired effects at the metal-water interface under real-time operating conditions correspondingly limits the validity of bulk water, inhibitor reserve requirements. Chemical reserve guidelines are just that They are not mandatory minimums or maximums. [Pg.361]

A further critical factor is the actives level and performance quality of DCAs. Thus the risks of scale deposition can be reduced by improving the quality of DCA, increasing the polymer actives level, and reducing all other critical factors (where possible). [Pg.401]

By introducing benzoquinone structures into a polymer, activities for dehydrogenation were obtained which were comparable to those of commercial dehydrogenation catalysts. An example is the polyquinone 97> ... [Pg.22]

The liquid phase and polymer phase activity coefficients were combined from different methods to see if better estimation accuracy could be obtained, since some estimation methods were developed for estimation of activity coefficients in polymers (e.g. GCFLORY, ELBRO-FV) and others have their origins in liquid phase activity coefficient estimation (e.g. UNIFAC). The UNIFAC liquid phase activity coefficient combined with GCFLORY (1990 and 1994 versions) and ELBRO-FV polymer activity coefficients were shown to be the combinations giving the best estimations out of all possible combinations of the different methods. Also included in Table 4-3 are estimations of partition coefficients made using the semi-empirical group contribution method referred to as the Retention Indices Method covered in the next section. [Pg.100]

ELBRO-FV cannot model water as a solvent, otherwise it was often better than UNIFAC-FV in accuracy. For water-containing systems UNIFAC liquid activity coefficient estimations should be used with ELBRO-FV polymer activity coefficients. [Pg.103]

These three steps may be repeated to reach the final structure. For example, microcapsules obtained by spray drying of polymer/active solution may be coated by a melted solution. The first encapsulation insures immobilization and stabilization of the active ingredient, while coating allows control of the level of protection and release. [Pg.27]


See other pages where Polymer activity is mentioned: [Pg.728]    [Pg.316]    [Pg.459]    [Pg.459]    [Pg.459]    [Pg.459]    [Pg.459]    [Pg.460]    [Pg.127]    [Pg.78]    [Pg.141]    [Pg.159]    [Pg.237]    [Pg.229]    [Pg.230]    [Pg.129]    [Pg.361]    [Pg.718]    [Pg.831]    [Pg.47]    [Pg.3]    [Pg.341]    [Pg.130]    [Pg.100]    [Pg.103]    [Pg.109]    [Pg.567]   
See also in sourсe #XX -- [ Pg.20 ]

See also in sourсe #XX -- [ Pg.14 ]

See also in sourсe #XX -- [ Pg.14 ]




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ACTIVE POLYMER MATERIAL

Activated diffusion through polymers

Activated monomer mechanism polymer chain generation

Activated state theory, polymer transport

Activation Energy of Secondary Relaxation in Polymers

Activation energy polymer transitions

Activation energy theories, polymer glass

Activation of polymers

Active centres and polymer

Active ester polymer-supported

Active polymer waveguides

Active polymer waveguides applications

Active polymers

Active polymers

Active polymers/gels

Activity coefficient , polymer

Activity coefficient Flory-Huggins polymer solution

Actuators, electrically active polymers

Adducts giving Nuclease Activity to Polymers

Amorphous polymers activated state theory

Amphiphilic polymers with activities

Amphiphilic polymers with activity against bacterial

Amphiphilic polymers with antibacterial activity

Anionic polymers, biologically active

Antibacterial Activity of Amphiphilic Polymers

Antibacterial activity cationic polymers

Anticancer Activity of Organotin Polymers

Anticancer compounds polymer activity

Antitumor activity, polymers

Aromatic polymers, chemical activity

Autoxidized polymers, activation

BIOLOGICAL ACTIVITIES OF POLYMERS

Bacterial surface active polymers

Batteries, electrically active polymers

Biocidal Activity of Biodegradable Polymers

Biological Activity of Amphiphilic Polymers

Biological sensors, electrically active polymers

Biologically active organic species high polymers

Biologically active polymers

Biologically active polymers discussion

Carbon-Based Polymers, Activated Carbons

Carcinoma, polymer activity against

Carcinoma, polymer activity against Lewis lung

Catalytically active polymers

Cellulose polymers, activation volume

Cellulose, surface-active polymers

Chemical sensors, electrically active polymers

Chemically active polymer

Chiral molecules optically active polymers

Chiral stationary phases optically active polymers

Chloroacetophenone Oxime-based Polymers Exhibit Biological Activity

Classification of Electrochemically Active Polymers

Coating materials, electrically active polymers

Colloids electrical active polymers

Complexes with Redox-active -Conjugated Polymers

Composite polymers electrical activity

Conducting Polymers which have Antimicrobial Activity

Conducting polymer blends, electrical activity

Conduction, electrically active polymers

Conjugation electrically active polymers

Divinyl ether-maleic anhydride polymer, biological activity

Electrical conductivity, electrically active polymers

Electrically active polymer materials

Electrically active polymer materials actuation

Electrically active polymer materials artificial muscle

Electrically active polymers

Electrically active polymers Electrodes

Electrically active polymers Photovoltaic cells

Electrically active polymers Poly

Electrically active polymers Transistors

Electrically active polymers acids

Electrically active polymers applications

Electrically active polymers barriers

Electrically active polymers batteries/supercapacitors

Electrically active polymers biomedical applications

Electrically active polymers colloids

Electrically active polymers electrical properties/conductivities

Electrically active polymers electrochemical cells

Electrically active polymers electrochromism

Electrically active polymers electronics

Electrically active polymers mechanical properties

Electrically active polymers nonlinear optics

Electrically active polymers optical properties

Electrically active polymers overview

Electrically active polymers photovoltaics

Electrically active polymers polyacetylenes

Electrically active polymers properties

Electrically active polymers stability

Electrically active polymers synthesis

Electro active polymers

Electro-active polymer gels as artificial muscles

Electro-active shape memory polymers

Electrochemical doping, electrically active polymers

Electrochemically active polymers

Electrochemically active polymers classes

Electrochemistry of Thin Redox-Active Polymer films

Electroluminescence , electrically active polymers

Electronically active polymers

Energetics electrically active polymers

Epoxide polymers active sites

Esters, active polymer-bound

Free radical polymerization biologically active polymers

Helical conformation optically active polymers

Hemolytic activities, amphiphilic polymers

High activity vapor, polymer transport

Inclusion Complexes Between Polymers and Cyclic Molecules Surface Activity

Light-activated shape memory polymers

Light-emitting diodes , electrically active polymers

Lung carcinoma, polymer activity

Magnetically-active shape memory polymers

Metal-containing polymers biological activities

Metal-polymer film materials catalytic activity

Microstamping on an activated polymer surface

Molecular electronics, electrically active polymers

Nonlinear optically active polymer

Olefins optically active polymers

Optical activity in polymers

Optical activity natural polymer derivatives

Optical activity synthetic polymers

Optical activity vinyl polymers

Optically Active Dendronized Polymers

Optically active carbazole polymers

Optically active natural polymers

Optically active polymers

Optically active polymers naturally occurring

Optically active polymers stereoisomerism

Optically active polymers substituted

Optoelectronically active polymers

Organic polymer, activated carbon

Organotin polymer activity

Organotin polymers anticancer activity

Other Active Ester-Forming Polymers

Peptide biological activity, polymer

Pharmacologically active polymers

Pharmacologically active polymers models

Plasma polymerization, electrically active polymers

Platinum-containing polymers anticancer activity

Polycarboxylic acid polymers activation

Polymer Stereochemistry and Optical Activity

Polymer [continued activity

Polymer [continued biological activities

Polymer dynamics Polymers, activated

Polymer light-emitting diode research electrically active polymers

Polymer mechanical activation

Polymer medium, active

Polymer oxygen diffusion, activation energy

Polymer relaxation activity, effects

Polymer relaxation activity, effects Polymers

Polymer stabilization stabilizer activity

Polymer straight chain active

Polymer surface active

Polymer synthetic activity

Polymer-Metal Nanocomposites with Antimicrobial Activity

Polymer-capped Bimetallic Nanoclusters as Active and Selective Catalysts

Polymer-supported crown ethers catalytic activity

Polymer-supported phase transfer activity

Polymeric materials/polymers electrically active

Polymers activation energy

Polymers activator

Polymers activator

Polymers anticancer activity

Polymers antithrombogenic activity

Polymers antiviral activity

Polymers as Gene-Activated Matrices for Biomedical Applications

Polymers as active chemical sensors

Polymers electrochemical activation

Polymers solvent activities

Polymers structure-activity relationships

Polymers, activation

Polymers, activation

Polymers, optically active poly

Pressures (Solvent Activities) for Binary Polymer Solutions

Pyrolysis activation energy, polymer

Redox chemistry, electrically active polymer

Redox-Active Conjugated Polymer-Based Recognition

Redox-active polymers, deposition onto

Relaxation Activation Energy of Polymers in the Glass Transition Region

Relaxation activation energy, polymers

Resorbable polymers mechano-active tissue engineering

Sensor technology, electrically active polymers

Shape memory polymers moisture-active

Siloxane polymers surface activity

Singlet oxygenated polymers, activation

Smart polymers light active

Solid polymer electrolytes activated carbon electrodes

Specialized activation treatments polymer

Stimuli-Responsive and Active Polymers in Drug Delivery

Strategies Toward Hierarchically Structured Optoelectronically Active Polymers

Supercapacitors, electrically active polymers

Surface Activity of Polymers

Surface activity fluorocarbon polymers

Surface-Active Polymers from Cellulose

Surface-active cellulosic polymer

Surface-active siloxane polymers

Synthesis of Optically Active Polymers

Synthetic polymers optically active compounds

Termination by breaking metal-polymer bond in active centre

Thin redox-active polymer

Transport activation energy, of polymer segments

Vinyl polymers helical conformation, optical activity

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