• shape memory
  • This device consists of electromechanical microactuator mounted on the distal tip of either a Prowler-14 microcatheter The microactuator is fabricated using a shape memory polymer (SMP) shell over a shape memory nickel-titanium alloy (nitinol) wire backbone with attached copper leads to deliver a current. (wikipedia.org)
  • University of Mass
  • Research on developing fire-safe polymers with more desirable properties is concentrated at the University of Massachusetts Amherst and at the Federal Aviation Administration where a long-term research program on developing fire-safe polymers was begun in 1995. (wikipedia.org)
  • plastics
  • Metabolix and other companies are exploring whether plants can be genetically engineered to make polymers for producing bioplastics in a way that's cheaper than oil-based plastics, the Christian Science Monitor reports. (environmentalleader.com)
  • By far the most important industrial polymers (for example, virtually all the commodity plastics) are polymerized olefins . (britannica.com)
  • Worlds first plastics rear axle using BASF polymer is produced. (innovateuk.org)
  • Plastics recyclers in the UK are facing financial pressures following the drop in oil prices at the end of 2014 and the subsequent fall in virgin polymer prices. (innovateuk.org)
  • MBA Polymers is a recycling company with operations globally that recovers plastics from end-of-life durable goods. (wikipedia.org)
  • MBA Polymers Ltd is working with The Plastic Bank to develop initiatives to incentivise people around the world to recycle more plastic and improve the sustainability of the plastics industry. (wikipedia.org)
  • solid polymer
  • Pellets or granules of the solid polymer are fed into an extruder. (wikipedia.org)
  • The direct spinning process avoids the stage of solid polymer pellets. (wikipedia.org)
  • Inorganic polymers may provide greater consumer safety owing to improved properties and environmental compatibility (no need for plasticizers, intrinsically flame-retardant properties), technological and economic advancement (solid polymer electrolytes for consumer electronics based on polymers with a low glass-transition temperature), molecular electronics with non-metal elements as improvement and replacement for metal-based conductors and electronic circuits. (wikipedia.org)
  • organic
  • A coordination polymer is an inorganic or organometallic polymer structure containing metal cation centers linked by organic ligands. (wikipedia.org)
  • Coordination polymers are relevant to many fields such as organic and inorganic chemistry, biochemistry, materials science, electrochemistry, and pharmacology, having many potential applications. (wikipedia.org)
  • While organic polymers are often petrol-based, the backbone of SIPs is made from elements other than carbon which lessens the burden on scarce non-renewable resources or even provide alternatives to them (sustainability). (wikipedia.org)
  • thermal
  • For example, the ceiling temperature Tc for formaldehydeis 119 °C and that for acetaldehyde is -39 °C. Unlike stable polymers such as PVCs that have high thermal stability, depolymerizable polymers and closely related self-immolative polymers can be triggered by stimuli to break fast under moderate to low temperatures. (wikipedia.org)
  • Hollow fiber membrane Spinning (polymers) Textiles Thermal cleaning Li, Norman N. (2008). (wikipedia.org)
  • As long as the heat supplied to the polymer remains sufficient to sustain its thermal decomposition at a rate exceeding that required to feed the flame, combustion will continue. (wikipedia.org)
  • Crystallization affects optical, mechanical, thermal and chemical properties of the polymer. (wikipedia.org)
  • Apart from the thermal mechanism, nucleation is strongly affected by impurities, dyes, plasticizers, fillers and other additives in the polymer. (wikipedia.org)
  • The interaction strength depends on the distance between the parallel chain segments and it determines the mechanical and thermal properties of the polymer. (wikipedia.org)
  • For example, studies have shown that by altering the thermal transition of the polymer, shape memory behavior can be exhibited. (wikipedia.org)
  • As the temperature within the polymer rises, the stiffness and yield strength will fall, and thermal failure becomes a possibility as deformation levels become excessive. (wikipedia.org)
  • monomers
  • Typically, single chain cyclized/knotted polymers are synthesized by deactivation enhanced ATRP of multivinyl monomers via kinetically controlled strategy. (wikipedia.org)
  • Depolymerizable Polymers or Low-Ceiling Temperature Polymers refer to polymeric materials that can undergo depolymerization to revert the materials to their monomers at relatively low temperatures such as room temperature. (wikipedia.org)
  • responsive
  • pH sensitive or pH responsive polymers are materials which will respond to the changes in the pH of the surrounding medium by varying their dimensions. (wikipedia.org)
  • behavior
  • In the polymer, dipoles can be randomly oriented, but application of an electric field will align the dipoles, leading to ferroelectric behavior. (wikipedia.org)
  • Above the Curie Temperature, the polymer exhibits paraelectric behavior, which does not allow for ferroelectric behavior because the electric fields do not align. (wikipedia.org)
  • A consequence of ferroelectric behavior leads to piezoelectric behavior, where the polymer will generate an electric field when stress is applied, or change shape upon application of an electric field. (wikipedia.org)
  • This behavior is exhibited due to the presence of certain functional groups in the polymer chain. (wikipedia.org)
  • This swelling behavior is observed when the pH is greater than the pKa of the polymer. (wikipedia.org)
  • inorganic
  • Discoveries in the past decades revealed the potential of inorganic polymers for broad applicability in diverse fields. (wikipedia.org)
  • Recent developments in the field of Smart Inorganic Polymers have been summarized in a themed collection in the scientific journal Chemical Society Reviews. (wikipedia.org)
  • The European Union within its COST framework has launched a network called SIPs bundling the European activities in the relevant areas in order to establish structure-property-relations for the rational design of smart inorganic polymers. (wikipedia.org)
  • The combination of leading scientists with common motivation but diverse expertise together with industrial partners intends to foster transnational efforts towards the design and application of novel smart inorganic polymers. (wikipedia.org)
  • Manners, I. "Inorganic Rings and Polymers of the p-Block Elements" RSC Publishing, Cambridge, UK: 2009. (wikipedia.org)
  • backbone
  • The general form of the polymer is a backbone with functional "pendant groups" that hang off of it. (wikipedia.org)
  • the chemical bond in a polymer backbone may be broken with the generation of free radicles by heat, ionizing irradiation, mechanical stress and chemical reactions. (wikipedia.org)
  • resins
  • In plastic (thermoplastic and thermosetting resins) , polymers are divided between those that are soluble in selective solvents and can be reversibly softened by heat (thermoplastics) and those that form three-dimensional networks which are not soluble and cannot be softened by heat without decomposition (thermosets). (britannica.com)
  • flammability
  • Incorporating flame-resistant additives into polymers became a common and relatively cheap way to reduce the flammability of polymers, while synthesizing intrinsically fire-resistant polymers has remained a more expensive alternative, although the properties of these polymers are usually more efficient at deterring combustion. (wikipedia.org)
  • Examples
  • Glucose or mannose-contain n-alkyl urea peptoid oligomer, glucose modified diamine with pedant monosaccharides are examples of heparin mimicking polymers. (wikipedia.org)
  • thermoplastic
  • If the polymer is a thermoplastic then it can be simply melted, otherwise it is dissolved in a solvent or chemically treated to form soluble or thermoplastic derivatives. (wikipedia.org)
  • temperature
  • Crystal growth is achieved by the further addition of folded polymer chain segments and only occurs for temperatures below the melting temperature Tm and above the glass transition temperature Tg. (wikipedia.org)
  • Polymers can be designed to respond to more than one external stimulus, such as pH and temperature. (wikipedia.org)
  • Typically the sealant products manufactured with silyl modified polymers have good adhesion on a wide range of substrate materials, and have good temperature and UV resistance. (wikipedia.org)
  • Some of this inelastic deformation energy is dissipated as heat within the polymer, and consequently the materials temperature will rise as a function of frequency, testing temperature, the stress cycle and the type of polymer. (wikipedia.org)
  • stimulus
  • This is where the polymer conforms to deformed shape and then returns to its original configuration due to certain stimulus. (wikipedia.org)
  • oxygen
  • in heterochain polymers a number of other elements are linked together in the backbones, including oxygen, nitrogen, sulfur, and silicon. (britannica.com)
  • Oxygen catalyzes the pyrolysis of polymers at low concentration and initiates oxidation at high concentration. (wikipedia.org)
  • The amount of access that oxygen has to the surface of the polymer also plays a role in polymer combustion. (wikipedia.org)
  • Oxygen is better able to interact with the polymer before a flame has actually been ignited. (wikipedia.org)
  • structures
  • Such formation manner endows supramolecular polymers with features, being more sensitive to external stimuli and able to render reversibly dynamic changes in structures and functions. (wikipedia.org)
  • properties
  • The composition and structure of R determines which of the huge array of possible properties will be demonstrated by the polymer . (britannica.com)
  • Metamaterials (those engineered to give properties not found in nature) often contain polymers and rubbers. (innovateuk.org)
  • After the discovery of PVDF, many other polymers have been sought after that contain ferroelectric, piezoelectric, and pyroelectric properties. (wikipedia.org)
  • Two years later, the ferroelectric properties of the same polymer were reported. (wikipedia.org)
  • Unlike conventional bonded polymers, supramolecular polymers engage in a variety of non-covalent interactions that define their properties. (wikipedia.org)
  • Such properties enable supramolecular polymers to construct a dynamic and reversible network, which are able to develop self-healing materials based on noncovalent bonds. (wikipedia.org)
  • Current research in developing fire-safe polymers is focused on modifying various properties of the polymers such as ease of ignition, rate of heat release, and the evolution of smoke and toxic gases. (wikipedia.org)
  • By altering the chemical structure of the polymer, certain properties can be exhibited. (wikipedia.org)
  • chain
  • Classified according to composition, industrial polymers are either carbon-chain polymers (also called vinyls) or heterochain polymers (also called noncarbon-chain, or nonvinyls). (britannica.com)
  • The movement of long chain polymers through nanopores is a key part of many biological processes, including the transport of RNA, DNA, and proteins. (redorbit.com)
  • The unique alternating chain propagation/intramolecular cyclization process eventually leads to the single chain cyclized/knotted polymer architecture. (wikipedia.org)
  • These pendent vinyl groups have the potential to react with propagating active centres either from their own polymer chain or others. (wikipedia.org)
  • Alamanda Polymers, Inc. is a life sciences company that was formed in 2007 that specializes in formation of polyamino acids to specific chain links for research purposes. (wikipedia.org)
  • Alamanda Polymers was formed in 2007 and produces specialized polyamino acids to specific chain links for research purposes. (wikipedia.org)
  • Stabilizers for polymers are used directly or by combinations to prevent the various effects such as oxidation, chain scission and uncontrolled recombinations and cross-linking reactions that are caused by photo-oxidation of polymers. (wikipedia.org)
  • The chain length, intermolecular forces and reactive sites influence the specific function of the heparin-mimicking polymer. (wikipedia.org)
  • Cyclic loading can bring about failure in polymer due to: chain scission, built up heat due to hysteresis, recrystallization of material and cumulative crack generation. (wikipedia.org)
  • Chain scission occurs in a polymer as a result of intense localized heat. (wikipedia.org)
  • Therefore
  • After reductive dechlorination or debromination with tri-n-butyltin hydride they become a reversed VF2 unit in the final polymer.Therefore, a regioisomer of PVDF is formed. (wikipedia.org)
  • Manufacturing
  • We 'Millennium Polymers' are engaged in Manufacturing, Supplying, Trading and Exporting HDPE, PP Cosmetic Bottles, Cream Jars, Flip Top Caps and Trigger Pumps. (slideshare.net)
  • acrylic
  • The site highlighted the strengths of the styrene-butadiene product line, while demonstrating the emerging, 'one customer at a time' line of styrene-acrylic and acrylic polymer emulsions. (prweb.com)
  • Within these key themes, the company reinforces its' drive to create customized products for individual clients, whether these are acrylic polymer emulsions , carboxylated styrene-butadiene latexes, resin supported styrene-acrylics for printing and packaging, vinyl acetate latex emulsions, or rheology modifiers for concrete. (prweb.com)
  • materials
  • but then you would be missing the point that both these materials (polymers) are pretty. (innovateuk.org)
  • Many time honored materials are now recognized as coordination polymers. (wikipedia.org)
  • Ferroelectric polymers fall into a category of ferroelectric materials known as a 'order-disorder' material. (wikipedia.org)
  • Subsequently, there has been tremendous growth during the past decade in exploring the materials science, physics, and technology of poly(vinylidenefluoride) and other fluorinated polymers. (wikipedia.org)
  • Compared with self-healing materials based on covalent bonds, these supramolecular polymers-based self-healing materials can restore the initial structure and function of polymers before being exposed to damages, and can also undergo repeating damage-heal process. (wikipedia.org)
  • Three types self-healing materials are illustrated here: hydrogen bonding-based, metal coordination-based and π-π interaction-based self-healing supramolecular polymers. (wikipedia.org)
  • Dielectric EAPs are materials in which actuation is caused by electrostatic forces between two electrodes which squeeze the polymer. (wikipedia.org)
  • Fire-safe polymers also find application as adhesives in aerospace materials, insulation for electronics, and in military materials such as canvas tenting. (wikipedia.org)
  • often
  • Coordination polymers are often prepared by self-assembly, involving crystallization of a metal salt with a ligand. (wikipedia.org)
  • Raw material arrives at MBA Polymers' recycling facilities either shredded or as whole parts, often from other recyclers that do not handle plastic. (wikipedia.org)
  • thus, an electroactive polymer is often referred to as an artificial muscle. (wikipedia.org)
  • Often, these polymers are structured as a copolymer where each polymer displays one type of response. (wikipedia.org)
  • For example, block copolymers often form micelles, as will star polymers and branched polymers. (wikipedia.org)
  • artificial
  • Scientists from a US university have a created a new super stretchy, self-healing polymer that could lead to the creation of artificial muscle. (innovateuk.org)
  • By incorporating electron donor and electron acceptor into the supramolecular polymers, a number of artificial systems, including photosynthesis system, can be constructed. (wikipedia.org)
  • Then a light-to-charge conversion system with faster photoinduced electron transfer and higher electron-transfer efficiency can be achieved in these artificial polymers. (wikipedia.org)
  • orientation
  • The occurrence of brittle failure can be decreased by: increasing the molecular weight, inclusion of rubber phase, inducing orientation in the polymer and reducing internal defects and contaminants. (wikipedia.org)
  • occurs
  • In modeling a tapering pore, they confirmed that translocation occurs faster when the polymer enters the wide side of the pore. (redorbit.com)
  • relatively
  • While certain polymer categories, such as fluoropolymers are witnessing relatively lower growth due to a slowdown in application development, other categories such as LCPs are projected to be the fastest growing based on widespread use in electrical and electronics. (redorbit.com)
  • Failure in polymer components can occur at relatively low stress levels, far below the tensile strength because of four major reasons: long term stress or creep rupture, cyclic stresses or fatigue, the presence of structural flaws and stress-cracking agents. (wikipedia.org)