polymer

Hydrolysis of polymers, as with their low-molecular weight analogs, is often catalyzed by traces of acids or bases.

Across the world a number of groups are trying to develop synthetic polymers to deliver genes, entirely removing the need to use viruses.

Headquartered in the United States, INVISTA is one of the world's largest integrated fibers and polymers businesses with a global presence.

The stimuli-responsive polymers have been used for solubility control in water.

The sharp of translocation time distribution of symmetrical-folded polymers is similar to that of closed circular polymers.

If all goes well, then, a useful new family of polymers looks ready to be spun.

Polyaniline(PAn) is considered to be the most prospective in application among the various structural conducting polymers.

Space charges are easy to be formed in insulating polymers under dc stress because of the trapped charges.

Technical polymers are at the heart of these systems, mainly polyamides.

Certain linear polymers, referred to as thermosetting, contain groups which, when heated, react to give cross-linked polymers.

In another embodiment, at least one component exhibits interlayer adhesion strength similar to vinylidene chloride polymers.

The results can provide some evidences when methyl-testosterone imprinted polymers were used for the extraction of real samples.

However, the poor wettability of these polymers presents the designer with the problem of bonding or decorating materials made from them.

It is possible , within certain limits , to granulate polymers with analogous characteristics with the same die-plate.

The concentration measurement of novel water-soluble polymers used in EOR by means of ultraviolet spectroscopy is discussed.

Some polymer with a branched chain, known as the branched-chain polymers, are linear structure.

Polyfluorene and its derivatives is one of the most promising electroluminescent polymers.

However, the poor wettability of these polymers presents the designer with the problem of bonding or decorating these materials.

Other Natural Polymers A most amazing natural polymer is human skin, which has no equal substitute.

Plexiglass draws its strength from the nature of its polymers, long chains of molecules that become entangled with one another.

Polyaniline is one of the most intensively investigated intrinsically conductive. polymers.

Two events of the twentieth century catapulted polymers into a position of worldwide importance.

The natural polymers has been used widely in biomaterial field due to their good biocompatibility.

So far, extensive studies have been conducted on the synthesis, structure and property of CNT-reinforced polymers.

polysaccharide is composed of many simple sugar molecules made of polymers, non-sweet, not soluble in water.

It may be a brine containing only selected solids of appropriate particle size ranges (salt crystals or calcium carbonate) and polymers.

High molecular weight polymers as drag reducing agents have been widely used in conduits during the transportation of crude oi I.

This effect is able to account for the experimental results observed for polymers with low concentration doping.

The invention relates to various aromatic diacid ester acetal polymers and a synthesis method of the aromatic diacid ester acetal polymers.

Plant oil is one of the most possible substitutes of petroleum to produce polymers, so that it becomes the research hotspot in recent years.

Fiber reinforced polymers (FRP) offer the prospect of such a cost effective repair.

This basic process is also used for co-injection of two different polymers. There are two extrusion barrels and injection systems.

Melt volume flow rate (MVR) is one of the important parameters for characterization of flow property of polymers.

Several natural polymers have been used as example to discuss the tendency and advance of the study.

Of such macromolecular systems emerge a class of spherical, hyper-branched polymers known as dendrimers.

One option is to use sequentially triggered vertebrae made of electroactive polymers, whose shape is modified by applying a voltage.

Peter Shepard, Novomer's executive vice president of polymers explained, explained the company's process to me.

Blending with biodegradable polymers, cross-linking treatment and surface modification are the main methods used currently.

Those molecular simulations can provide very detailed information about structure, and interactions, and dynamics of this kind of polymers.

Glucose molecules are thus the monomers out of which each of these polymers is constructed .

Polyester: Organic compound, any of a class of polymers formed by ester linkages between monomers.

Polymers are useful because they are lightweight, corrosion resistant, easy to process at low temperatures and generally inexpensive.

Recently, many ferroelectric polymers have been synthesized containing crystalline and liquid crystalline polymers.

The molecular self-assembly of coordination polymers and supramolecules is one of the most active research fields of current chemistry.

Synthetic organic polymers used to purify drinking water are severely limited in that their impurities and by-products harm human health.

We're going to build biodegradable scaffolding, made out of polyglycolide and other polymers normally used in surgery, to form the strap.

a high speed centrifuge used to determine the relative molecular masses of large molecules in high polymers and proteins.

Someday we expect to be able to make new polymers with specific properties and topologies (such as windings of their backbones ).

Compression molding is one of the oldest techniques for processing polymers.

This product is mainly used in sustained-release matrix applications, where hydrophilic matrix systems require water-soluble polymers.

Blends of collagen with either poly(vinyl alcohol) or poly(acrylic acid) have been prepared by mixing aqueous solutions of the two polymers.

Inorganic polymers have also been modified with reactive functional groups and used in processes requiring severe service conditions.

Semiconductive polymers include polymers or copolymers derived from thiophenes, pyrroles, anilines, and polycyclic heteroaromatics.

Liquid crystalline ionomers are a new kind of polymers which have the characteristics of both liquid crystalline polymers and ionomers .

Detailed analysis of polymers used in packaging materials, including structure and physical property attributes.

To test this improved technique, the Duke University researchers synthesized genes located in two different classes of protein-polymers.

The polymers change color in the presence of increasing levels of these biogenic amines to indicate degrees of food spoilage.

Associative polymers can be used to simultaneously achieve effective acidizing and water control during a single treatment.

Porous scaffold plays an important role in tissue engineering and polymers are the main materials for manufacturing scaffolds.

Having been processed, these polymers are made into a new waterproof material called GORE-TEX.

Certainly finding out how genetic polymers first arose would not by itself solve the problem of the origin of life.

A method was needed to make alkaline polymers cure at temperatures low enough to ensure body integrity.

SNF is a multination company and famous for being expertise in producing acrylamide-based polymers which used in wastewater treatment.

During the improvement of their performance, the energy band engineering of electroluminescent polymers will take positive effect.

The videodisc is made of liquid crystal polymers, about the size of a phonograph record.

This book introduces the subject by outlining the classification and development of biodegradable polymers.

Electro - optical( EO ) polymers have been extensively studied due to their potential applications in optoelectronics.

The biodegradable polymers as substrate and biofilm carriers is better choice for the denitrification progress of the aquaculture water.

Conducting polymers in the fabric would transmit the signals to a small computer chip that would filter the information.

The form was made of polymers that had a spongy and flexible texture.

New compound materials prepared by surface grafting of polymers onto inorganic microparticles have been applied widely in many trades.

Changes in the polymers that make up the rubber mean that the compound reacts differently to the track surface.

Presently the extracellular polymers in natural biofilms have been found to strongly impact the pollutants' action in aquatic environment.

By choosing thin initial layers and variable plasma conditions, a broad range of nanostructures can be obtained on various polymers.

In common fiber reinforced polymers, the CFRP has the high strength and high young's modulus, and is widely used in civil engineering.

So, chemists have been pursuing to design and synthesize the expected structures of coordination polymers with excellent properties.

Technical developments in the influence of radiation cross linking on properties of polymers and its applications were also reported.

High dimensional stability throughout the lifespan is achieved by the low creep tendency of the polymers used.

The investigators then transplanted that mixture of cells within the abdomen on biodegradable polymers or "scaffolding. "

Compounds having five-membered heterocyclic rings include chlorophyll, hemoglobin, indigo, tryptophan, and certain polymers.

Solid materials have been conveniently grouped into three basic classifications: metals, ceramics and polymers.

Alternatively, because both bacteria and polymers are repelled by water they may be pushed together by this joint repulsion.

CD (Circular dichroism) spectroscopy was used to measure the circular dichroism of O-LLA segments in polymers.

Such photovoltaic cells rely on conventional plastic polymers to provide a protective backing, also known as backsheets.

Tokyo Electric Power Company in the shaft next to the top of the concrete tunnel dug a hole, and then injected into these "polymers. "

The QCM technique could discriminate between the two different polymers, showing increased interaction between microparticle and PLMA.

Organic polymers and petroleum hydrocarbons are the main pollutants in viscous oil wastewater.

polyaspartic acid and its salts are newly biodegradable high molecular polymers with wide application in many areas.

Magnesium hydroxide of special morphologies can play multiple roles except for as a type of flame retardant after being added into polymers.

Many microbes can manufacture more than one kind of extracellular polymers whose compositions are variational during their growing cycle.

These molecules have "unsaturated" carbon bonds that allow them to be hooked together in long chains, called polymers.

Due to the ordered arrangement at molecules, the crystalline polymers reflect most incidents light and generally appear opaque.

The four chosen polymers were used as sensitive component for a sensor array, and then PCA is adapted to classify four simulant gases.

Density is defined as a material's mass divided by its volume. Most metals have relatively high densities, especially compared to polymers.

those able to react with three or more can form cross-linked, network polymers.

Filaments kept their minus-ends by protein complex, grow away from plasma membrane by the addition of actin polymers to the plus-end.

Chemical modification as manifested in crosslinked enzyme crystal, covalent attachment of polymers and surface modification retain useful.

"That could drastically change the ranking of these polymers, " Griffin said.

The results of mechanical properties test indicated that the complex smoke suppressor possesses good compatibility with polymers.

The catalytic performance could be easily tuned to produce tailor-made polymers by controlling electronic. . .

Extensive laboratory testing showed that associative polymers had no significant effect on the relative permeability to oil.

Also disclosed are polymers which stabilize and enhance the accuracy of the assay, and compounds which reduce interference by bicarbonate.

Electrical, optical, magnetic, and mechanical properties of metals, semiconductors, ceramics, and polymers.

PLASTICS. AQUEOUS DISPERSIONS OF POLYMERS AND COPOLYMERS. DETERMINATION OF WHITE POINT TEMPERATURE AND MINIMUM FILM-FORMING TEMPERATURE.

Processes for making supports comprising pendant side groups, and polymers and supports prepared by the method are also disclosed.

In this paper, three halogen-free flame retardants were prepared and their application in the polymers materials was also studied.

The latter contains at least one intrinsic diluent and one thickening diluent chosen from polymers such as starch and starch derivatives.

Hydrodynamic disintegration of activated sludge resulted in organic matter and polymers transfer from the solid phase into the liquid phase.

Conventional polymers usually have good processability, low density and good mechanical properties, but have not high conductive properties.

Any of a family of high - strength, resilient synthetic polymers, the molecules of which contain the recurring amide group CONH.

S are not of the polyalkene class. Their environmental compatibility and retrieval sex ratio relative polyolefin polymers.

Hardener for epoxy resins and adhesives, intermediate in manufacture of high performance polymers, raw material for azodyes manufacturing.

The properties, synthetic principle and preparation methods of this type of polymers were discussed.

Materials science: Electroactive polymers, also known as artificial muscles, could replace electric motors in some applications.

Thermodynamic conditions of phase equilibrium upon phase separation in plasticized network polymers were considered.

Screw pump can transport lubricants, fuel transportation, oil and transport all kinds of polymers, used for conveying sticky liquid.

The robofish bodies are continuous (i. e. , not divided into different segments), flexible and made from soft polymers.

Create a circular-based community pilot polymers recycling community development planning, standard system and practices.

Relation among chemical composition, physical structure , and mechanical behavior of plastics or synthetic high polymers.

The formation of supramolecular complexes between these polymers and Naproxen was confirmed by fluorescence spectroscopy.

PLASTICS. AQUEOUS DISPERSIONS OF POLYMERS AND COPOLYMERS. MEASUREMENT OF SUPERFICIAL TENSION DYNAMIC METHOD BY IMMERSION FOIL.

Polymers with azobenzene linkages are increasingly viewed as promising candidates in high molecular material research front domain.

Bayer MaterialScience AG is one of the world's largest producers of polymers and high-performance plastics.

Nowdays, research and exploitation of new materials based on natural polymers have become the front of polymer science.

A method of monomerizing human serum albumin polymers by treating the human serum albumin polymers with an alkaline solution.

Remarkable polymers with a renewable backbone provided by nature itself.

At the early period of SSP, the crystallization temperature of co polymers increased, the half-crystallization time decreased.

New, innovative auxiliaries and polymers show big contributions to effectiveness and process simplification.

Almost all recombinant enterokinase proteins were polymers after purification by Ni-affinity chromatography.

Dyes, detergents, polymers, proteins, and many other important substances exhibit colloidal behaviour.

The submitted plastic complies with the FDA Specifications for polyethylene olefin polymers requirement.

The mechanical properties of the new material show good results with tests revealing better properties than pure UP polymers.

Again, good base oil composition including viscosity improvers (polymers) are responsible for good ring sealing properties.

Polycarboxylic acids are one of the valuable donators in the synthesis of coordinate polymers.

Synthetic temperature-responsive polymers can be applied as gene carrier systems.

The results show that no gel has been found in irradiated polymers in solid state over a wide range of absorbed dose.

Research and ferroelectric polymers and their application to integrated pyroelectric sensors.

In this review, we focus on the progress in synthesis of new block polymers and multi block polymers by living cationic polymerization.

The method takes advantage of reverse suspension to prepare protein macromolecule polymers.

Graft copolymers, methods for grafting hydrophilic chains onto hydrophobic polymers, and articles thereof.

Foamed polymers have lower weight (and cost) over their nonfoamed counterparts, and , the mechanical properties are often comparable.

Various aromatic diacids and various divinyl ether compounds are heated to react in organic solvent to obtain novel ester acetal polymers.

The term "composite piles" usually refers to piles composed of fiber reinforced polymers (FRP), recycled plastics, or hybrid materials.

A variety of conjugated polymers with different light-emitting wavelengths and structures are being developed.

The LCST polymers can be cross-linked by a condensation reaction of the alkoxysilane groups.

Biodegradable polymers have been widely used as scaffold materials to regenerate new tissues.

A similar transformation has overtaken plastics. High-strength polymers now form bridges, ice-skating rinks and helicopter rotors.

The shift of fundamental resonance frequencies was negative for both polymers, indicating mass-coupling to the sensor surface.

Macroporous resin is a kind of do not dissolve in acids, alkalis and various organic solvents of the organic polymers.

Conventionally people use surfactants or polymers to stabilize emulsions. These emulsions, however, are thermodynamically unstable.

The other is the polymers that the main chains are comprised of fluorene and other functional groups through copolymerization.

Nanofibers of varied Polymers, with diameters in the different ranges, were prepared by self-designed equipment of electrospinning.

The only common feature of these substances is that they are non digestible polymers.

The crosslinking reaction of fumarate-trimethylolpropane pre-polymers was initiated by benzoyl peroxide (BPO) and vitamin C (VC).

The kinds, synthesis methods of ( Meth ) acyloxy silane or polysiloxane, properties of co polymers and application were reviewed.

Natural polymers, chitin and chitosan, obtained from shells of crab and shrimp has been widely used in various fields.

Both the two polymers were added to ammonium nitrate to prepare stabilized ammonium nitrate which were characterized by DSC, SEM and XRD.

It combines some characteristics of organic polymers, cements and ceramics for its special poly-condensed network structure.

thus, the polymers were of low polydispersity and the degree of polymerization could be precisely adjusted.

Hydrogels are a new kind of three-dimensional hydrophilic crosslinked polymers.

The macromolecule polymers take effect on improving soil structure, increasing soil penetration and controlling runoff on slope .

Objective: Propofol in human plasma was extracted by prepared molecularly imprinted polymers with propofol as template.

Toughening composite based on polymers is one of the trends of research in polymer science.

The simplest polymers are created when pressure or heat causes small molecules alter slightly and link together in a long chain .

The combination of HMHEC and cationic polymers surprising results in a synergistic effect.

This product sagely and effectively breaks conventional drilling mud, workover and completion polymers.

The problems and development trend are pointed out when natural triglyceride oil and its derivatives are used in the field of polymers.

ASP flooding system (ASP) is a flooding system which is mixed by three mixtures-alkali, surfactants and polymers in a certain proportion.

With the increase of the N(subscript H) value, the effects of surfactants on the viscosity of the polymers is enhanced.

We can expect any sufficiently complex set of catalytic polymers to be collectively autocatalytic .

The polymers had good applied prospects in synthesizing block copolymers, coating, slow releasing agent for medicine, etc.

The hydrocarbon molecules in those polymers are arranged in semicrystalline arrays featuring piezoelectriclike properties.

Polyester resins are unsaturated, cross-linked polymers which are made thermosetting by use of a peroxide-type catalyst.

Bentonite was modified with synthesized polymers to combine inorganic bentonite with organic polymers.

The effects of polymerization condition on viscosity-average molecular weight and stability of polymers were studied.

Acrylamide polymers are homopolymers of acrylamide and its copolymers collectively.

As natural polymers, chitin and chitosan had many unique physical, chemical and biological characteristics.

Isocyanate curing agents which when heated or reacted with hydroxy functional polymers giving urethane coatings.

The results show that the adsorption ability of bentonite for rosin acid was improved by being integrated with polymers.

At high degrees of cross-linking, polymers acquire rigidity, dimensional stability, and resistance to heat and chemicals.

The polymers containing calixarene-based ion exchange resin will be widely applied in treating waste water containing poisonous metal ions.

The book focuses on the theory describing the behavior of smart polymers in solution, as gels , and when grafted to surfaces.

Polymers with short side-chain length, low molecular weight or high density of charge have improved dispersing effects and longer set time.

But, one day, Flickinger's polymers could help wean us off fossil fuels, one light bulb at a time.

The high cis synthetic polymers naturally have properties closely resembling those of natural rubber.

Emphasis was placed on the biocompatibility and mechanical properties of carbon fiber reinforced polymers.

Emulsion polymerization is the most common and useful method for preparing waterborne organosilicon polymers.

This finding stems from work we were doing on shape memory polymers, in part to satisfy our own curiosity.

For development of bio-reactor enzymes stimuli-responsive polymers have been employed as immobilizing matrices.

Proceedings of the Takasaki symposium on radiation processing of natural polymers.

He has no idea what cross-linked polymers are.

molecularly imprinted polymers adsorbed propofol selectively in human plasma.

The light emission of the polymers is dramatically enhanced, instead of being quenched, by aggregate formation.

Crystalline polymers usually are more resistant to organic solvents and have good fatigue and wear-resistant properties.

The technologies of nano-compositing of polymers experienced a transformation from physical means to chemical ones.

Polysaccharides are polymers of monosaccharide units joined together by glycosidic bonds.

FTIR exploits the fact that most synthetic fibres are carbon based polymers.

The plastic can have a base polymer that is a blend of two or more polymers and various thermally conductive fillings.

Starch is one of the most abundant natural polymers in the earth.

Said fabric compositions comprise fibers of olefin block interpolymers or homogeneous branched ethylene polymers or a combination thereof.

Biodegradable hydrogen-bonded, ring-containing polymers were prepared.

Polymers in decorative materials and surface protection material of toughening the R & D, manufacturing and sales.

As alternatives, organic polymers are more versatile and easier to machine than glass and quartz.

A variety of synthetic and natural polymers are being employed for the fabrication of scaffolds.

Most plastic products for domestic or construction use consist of three-dimensional networks of cross-linked polymers.

In general, the water-soluble polymers improve both pharmaceutical and biological properties of drug-CD complexes.

Chemical modified soy polymers are beneficial in coating operation and upgrading products' quality.

Also disclosed are said liquid-absorbing polymers and the use thereof in hygiene products and packaging materials.

DYNAMICAL STUDY ON THE BEHAVIOR OF ELECTROLUMINESCENT POLYMERS UNDER APPLIED ELECTRIC-FIELDS?

Self-healing materials have been made before, mainly polymers and composites.

The vast majority of injection molding is applied to thermoplastic polymers.

Konjac agent for the natural super absorbent polymers, belonging to the ecological safety of water-saving products.

The substituent effects of ethoxy groups were studied on the chemical composition and properties of plasma polymers.

The ideal process was gotten by changing the stirring rate, concentration of emulsifier and composition of polymers.

so degradable biomedical polymers are greatly concerned by the researchers.

PLASTICS. AQUEOUS DISPERSIONS OF POLYMERS AND COPOLYMERS. MEASUREMENT OF DENSITY.

Viscosity method was improved for Polymers relative molecular weight measurement.

All the other uranium fluorides are in volatile solids which are coordination polymers.

A series of super absorbent polymers with different monomer composition and water-absorbency were prepared by emulsion polymerization.

These findings show that it is suitable and efficient to construct metal-organic coordination polymers.

Staple and tow are made commercially by both the wet and dry processing from modified polymers having improved dyeability .

Self-consistent field theory is proposed to investigate equilibrium polymers adsorbed between two parallel plates.

Polysaccharides are polymers of monosaccharides.

Paint-Pigments, Drying Oils, Polymers, Resins, Naval Stores, Cellulosic Esters, and Ink Vehicles.

This paper reviews shape memory polymers(SMPs), their composites and the applications in deployable structures.

We studied the origin of symmetry breaking and confinement effect in conducting polymers with ring structures in this paper.

Molecular imprinting is a method to prepare polymers with desired recognition site appeared in recent years.

The tacticity of polymers is mainly influenced by the polarity of substituent group of vinyl monomer.

It also discussed the practical application of conducting polymers spectra properties.

Typically, fragile ceramics or rigid polymers are used in surgery to fix broken, old or cancer-damaged bones.

Lignin: Complex oxygen-containing organic compound, a mixture of polymers of poorly known structure .

Thinly coated onto plastic or metals, the polymers, which are infused with bacteria, are permeable to gases and nutrients.

For example, chaotic mixing can be used for conductive compounds and layer multipliers for extrusion of two polymers.

The article details the advances in X-ray photoelectron spectrcopy(XPS)applied to surface degradation of polymers.

However, the polymers are less pseudoplastic than LDPE, so melt viscosities are higher during processing.

In effect, the kernel has turned itself inside out, and as it cools, the starch and protein polymers harden into the familiar crispy puff.

Development of studies on the preparations and properties of conducting polymers( CPs ) with different wettability are reviewed.

The firm also injects special polymers into the field that help free droplets of oil sticking to the rocks.

Synthetic polymers are currently used in medicine, including for sutures that degrade over time and wound-repair dressings.

Synthetic polymers and in particular PP and PET, offer the possibility to produce fibers with specific properties.

Genetic molecules such as DNA and RNA are polymers (strings of smaller molecules) made of building blocks called nucleotides.

As a rich resource and extensive use of natural polymers, the market prospects of chitosan and its derivatives is very significant.

The polymers used to make bearings have a low coefficient of friction and are highly resistant to wear and fatigue.

Oligmer is also known as pre-polymers, is in the UV varnish on the most basic components.

As polymers have a low coefficient of friction, the bearings do not need lubrication.

Synthetic Mud: A viscous cocktail of minerals, polymers and seawater stabilizes the borehole walls.

Geopolymer, a new kind of inorganic polymers, has some better properties than organic high polymers.

At the same time, the challenges for the application of new polymers for surface modification were also proposed here.

Superabsorbent polymers(SAP) were prepared and used as a novel self-curing admixture in cement-based materials.

In Chapter 3, the dynamics of the translocation of closed circular, closed knotted and folded polymers is also studied by the same method.