Polymer degradation
Polymer degradation Polymer degradation is a change in the properties - tensile strength, colour, shape, etc - of a polymer or polymer based product under the ...
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Polymer physics
Polymer physics Polymer physics is the field of physics associated ... well as the kinetics of reactions involving degradation and polymerisation of polymers and monomers respectively ... of condensed matter physics, the field of polymer physics has developed as a branch of statistical physics. Polymer physics and polymer chemistry are part ...
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Lithium ion polymer battery
Lithium ion polymer battery "LiPo" redirects here. For the Chinese ... see Li Bai. A prototype Lithium-Ion Polymer Battery at NASA Glenn Research Center. Lithium ion polymer batteries, or more commonly lithium polymer batteries (Abbreviated Li-Poly or LiPo) are ... lithium ion design, but in a solid polymer composite such as polyacrylonitrile. There are ...
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Tissue engineering
... a surgical removal. The rate at which degradation occurs has to coincide as much as ... polyglycolic acid (PGA) and polycaprolactone (PCL): their degradation mechanism is similar to that of PLA ... a faster and a slower rate of degradation compared to PLA. Scaffolds may also be ... but with a limited thickness. First the polymer is dissolved into a suitable organic solvent ... size of the scaffold pores, while the polymer to porogen ratio is directly correlated ...
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Polyethylene terephthalate
... is fully recyclable. Unlike other plastics, its polymer chains can be recovered for additional use ... is dependent upon the length of its polymer chains. The longer the chains, the stiffer ... dimethanol (CHDM) can be added to the polymer backbone in place of ethylene glycol. Since ... This interferes with crystallization and lowers the polymer's melting temperature. Replacing terephthalic acid (right ... chain, interfering with crystallization and lowering the polymer's melting point. Another common modifier ...
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Flexplay
... chemistry The reactive layer comprises of a polymer resin that acts as a carrier for ... dependent on the pH of the resin polymer matrix. By adding basic compounds (eg. 1 ... organometallic compounds) can be added to the polymer formulation, reacting with the oxygen present in the polymer matrix in shorter timeframe than the hydrolysis ... the diffusion rate of oxygen through the polymer layer is more or less constant, ...
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Protein sequencing
... sequencing are mass spectrometry and the Edman degradation reaction. It is also possible to generate ... variety of reagents to prevent or reduce degradation - thiol reagents or phenol to protect tryptophan ... and because the first round of Edman degradation is often contaminated by impurities and therefore ... chloride. Phenylisothiocyanate , the reagent for the Edman degradation, can also be used. The same questions ... of amino acid concentrations against time. Edman degradation The Edman degradation is a very ...
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Process ground-freezing   (translated from French)
... makes it possible to manufacture an inorganic polymer by simple chemical reactions and at a ... siloxanes are the basic units of inorganic polymer. In molecular architectures thus formed the building ... species is faster than the hydrolysis, the polymer is then gradually fed in monomers. The ... criticize) allows the expulsion of solvent without degradation of the ramified structure of the solid ... mineral part without they undergoing later thermal degradation. A first possibility consists in dissolving ...
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List of environment topics:P
... polyester recycling: see) Recycling of PET Bottles polymer polymer chemistry (macromolecular chemistry) polymer clay polymer degradation polymer physics polymer solar cells polymerase ...
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Corrosion
... first few hours at room temperature. The degradation of polymeric materials is due to a ... gained by mixing a given mass of polymer with another substance, making them generally quite ... While dissolution is a problem in some polymer applications, it is relatively simple to design ... undesirable changes. The most common form of degradation, however, is a decrease in polymer chain length. Mechanisms which break polymer ...
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