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• Nitrous oxide
  ...celerate [[rancidification]] of the butterfat; nitrous oxide inhibits such degradation. Carbon dioxide cannot be used for whipped cream because it is acidic in wa ...Vaseline triggered explosion of hybrid rocket]</ref> Some common building materials such as stainless steel and aluminium can act as fuels with strong oxidiser
  61 KB (8,728 words) - 16:50, 27 September 2010
• Morphine
  ...1925. At least three methods of total synthesis of morphine from starting materials such as coal tar and petroleum distillates have been patented, the first of ...ry urination and ejaculation which is often painful, saturation of bedding materials with bodily fluids, weight loss of two to five kilos per 24 hours, increase
  87 KB (12,376 words) - 16:51, 27 September 2010
• Aramid
  * no [[melting point]], degradation starts from 500°C * hockey sticks (normally in composition with such materials as wood and carbon)
  10 KB (1,313 words) - 10:07, 20 September 2010
• Polyanhydrides
  ...that can be metabolized and eliminated from the body. Owing to their safe degradation products, polyanhydrides are considered to be biocompatible. ...al for the short-term release of drugs or [[bioactive]] agents. The rapid degradation and limited mechanical properties of polyanhydrides render them ideal as co
  10 KB (1,280 words) - 10:09, 20 September 2010
• Applied spectroscopy
  ...mechanisms can be followed using [[infra-red spectroscopy]], such as [[UV degradation]] and oxidation, among many other failure modes. ...ec2.jpg|thumb|left|200px|IR spectrum showing carbonyl absorption due to UV degradation of [[polyethylene]]]]
  7 KB (1,065 words) - 10:09, 20 September 2010
• Ozone cracking
  ...ng most sensitive to degradation. Every [[repeat unit]] in the first three materials has a [[double bond]], so every unit can be degraded by ozone. [[Nitrile ru ...achines like [[compressor]]s with moving parts constructed from insulating materials. If those compressors feed pressurised air into a closed pneumatic system,
  8 KB (1,277 words) - 10:09, 20 September 2010
• UV degradation
  ...ntegrate (that is,if they are not UV-stable). The problem is known as ''UV degradation'', and is a common problem in products exposed to [[sunlight]]. Continuous ...UV-absorbing groups such as [[aromatic ring]]s may also be sensitive to UV degradation. [[Aramid]] fibres like [[Kevlar]] for example are highly UV sensitive and
  4 KB (613 words) - 10:09, 20 September 2010
• Environmental stress cracking
  ...of Diffusion on Environmental Stress Crack Initiation in PMMA. Journal of Materials Science 33 (1998) p 5193 – 5204</ref> The action of either a tensile stre It is somewhat different from [[polymer degradation]] in that stress cracking does not break polymer bonds. Instead, it breaks
  9 KB (1,372 words) - 10:09, 20 September 2010
• Forensic polymer engineering
  ...material evidence from crime or accident scenes, seeking defects in those materials that might explain why an accident occurred, or the source of a specific ma ...ch as [[skid mark]]s on exposed surfaces, where contact between dissimilar materials leaves material traces of one left on the other. Provided the traces can be
  10 KB (1,521 words) - 10:09, 20 September 2010
• Polybutylene
  PB-1, when applied as a pure or reinforced [[resin]], can replace materials like metal, rubber and engineering polymers. It is also used synergisticall ...ributed at a service temperature of 54 °C and 10 bar pressure. Other pipe materials in the same installation failed or corroded and had been replaced in the me
  12 KB (1,699 words) - 10:09, 20 September 2010
• Synthetic biodegradable polymer
  ...ivery]]. [[Degradation]] is important in [[biomedicine]] for many reasons. Degradation of the polymeric implant means surgical intervention may not required for r ...processing and handling, and some of the commercial devices based on these materials are discussed.
  8 KB (1,069 words) - 10:09, 20 September 2010
• Biopolymer
  ...l., "Biological Materials: Structure & Mechanical Properties", Progress in Materials Science, Vol. 53, p. 1 (2008) ...plant materials which can be grown year on year indefinitely. These plant materials come from agricultural [[non food crops]]. Therefore, the use of biopolymer
  68 KB (9,959 words) - 10:10, 20 September 2010
• Polybutene
  ...manufacture; 2) the molecular weight - viscosity relationships of the two materials may also be somewhat different. ...ensitive to [[oxidation]] when hot liquid is exposed to air. The [[polymer degradation]] reaction produces [[aldehydes]] and [[ketone]]s, which are the further ox
  4 KB (554 words) - 10:10, 20 September 2010
• Polypropylene
  ...ows polypropylene to be used as an [[engineering plastic]], competing with materials such as [[Acrylonitrile butadiene styrene|ABS]]. Polypropylene is reasonabl ===Degradation===
  25 KB (3,657 words) - 10:10, 20 September 2010
• Forensic chemistry
  ...b|right|200px|IR spectrum showing [[carbonyl]] absorption due to oxidative degradation of [[polypropylene]]]] ...r the identification of a compound. Spectroscopy can also help to identify materials used in failed products, especially [[polymer]]s, [[additive]]s and [[fille
  9 KB (1,340 words) - 10:10, 20 September 2010
• Factors of polymer weathering
  ...mong the environmental parameters influencing the degradation of polymeric materials, it is daylight, combined with the effect of temperature, moisture and atmo ...ther on materials, data are required on each factor that may contribute to degradation.
  12 KB (1,716 words) - 10:10, 20 September 2010
• Fire-safe polymers
  ...cal)|insulation]] for [[electronics]],<ref name="kumar" /> and in military materials such as canvas tenting.<ref name=hindersinn>Hindersinn, R. R. Historical As ...tempts found application in reducing the flammability of wood for military materials, theater curtains, and other textiles, for example. Important milestones du
  17 KB (2,260 words) - 10:10, 20 September 2010
• Weather testing of polymers
  ...s''' is the controlled [[polymer degradation]] and [[polymer]] [[coating]] degradation under lab or natural conditions. Just like erosion of rocks, natural phenomena can cause degradation in polymer systems. The elements of most concern to polymers are Ultraviole
  12 KB (1,780 words) - 10:10, 20 September 2010
• National Centre for the Evaluation of Photoprotection
  ...nter for durability prediction and failures analysis of plastics (polymer) materials.<br /> These materials can eventually fail during their service life and it is crucial to be able,
  6 KB (824 words) - 10:10, 20 September 2010
• Polyethylene terephthalate
  [[Plastic bottles|PET bottles]] are excellent barrier materials and are widely used for [[soft drink]]s (see [[carbonation]]). For certain Like most materials, PET tends to produce many small [[crystallite]]s when crystallized from an
  43 KB (6,272 words) - 10:11, 20 September 2010

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