Search results

• Wood Gas
  ...ar, releasing methane (CH₄) and tar rich in polycyclic aromatic hydrocarbons (PAH). Other gasifiers are fed with previously pyrolysed char. Wood gas is
  11 KB (1,707 words) - 17:26, 24 June 2010
• Coal tar
  ...black liquid of high [[viscosity]], which smells of [[naphthalene]] and [[aromatic hydrocarbon]]s. Coal tar is among the by-products when [[coal]] is .... Coal tars are complex and variable mixtures of [[phenols]], [[polycyclic aromatic hydrocarbon]]s (PAHs), and [[heterocyclic compound]]s. It is a mixture of a
  5 KB (781 words) - 09:07, 20 September 2010
• Plastic bottle
  ...arance to HDPE and have exceptional barrier properties to hydrocarbons and aromatic solvents. Fluorine treated bottles are excellent for use with insecticides,
  9 KB (1,285 words) - 14:54, 15 April 2013
• Liquid crystal polymer
  '''Liquid-crystal polymers (LCPs)''' are a class of aromatic [[polyester]] [[polymer]]s. They are extremely [[Reactivity|unreactive]] a ...Kevlar. Chemical structure of this aramid consists of linearly substituted aromatic rings linked by amide groups. In a similar way, several series of thermotro
  4 KB (613 words) - 09:09, 20 September 2010
• Polyanhydrides
  There are three main classes of polyanhydrides: aliphatic, unsaturated, and aromatic. These classes are determined by examining their R groups (the chemistry o ...lting temperature range of 50–90 °C, and solubility in chlorinated hydrocarbons. They [[degrade]] and are eliminated from the body within weeks of being i
  10 KB (1,280 words) - 09:09, 20 September 2010
• Polybutylene
  ...ater).<ref name=b1/> It shows lower resistance to aromatic and chlorinated hydrocarbons as well as oxidising acids than other polymers such aspolysulfone and polya
  12 KB (1,699 words) - 09:09, 20 September 2010
• Biopolymer
  ...atic polyesters are readily degraded by biological systems, the more rigid aromatic polymer compound is generally considered to be bioinert. ...s high. Many plasticsdo not support microbial growth. Low molecular weight hydrocarbons, however, can be degraded by microbes. They are taken in by microbial cells
  68 KB (9,959 words) - 09:10, 20 September 2010
• Polysulfone
  ...ganic solvent]]s (eg. [[ketone]]s and [[chlorinated hydrocarbon]]s), and [[aromatic hydrocarbon]]s. Mechanically, polysulfone has high compaction resistance, r
  5 KB (716 words) - 09:10, 20 September 2010
• Factors of polymer weathering
  ...increases the amount of solar radiation absorbed by conjugated unsaturated hydrocarbons through formation of a complex with these materials. ...al reactions involving oxygen differ in the inner and outer layers of both aromatic and aliphatic polymers due to their dependence on the diffusion of oxygen t
  12 KB (1,716 words) - 09:10, 20 September 2010
• Polymer
  ...mer to degradation depends on its structure. Epoxies and chains containing aromatic functionality are especially susceptible to [[UV degradation]] while polyes ...lymer together. When heated above 450 °C it degrades to form a mixture of hydrocarbons. Other polymers—like polyalphamethylstyrene—undergo specific chain scis
  45 KB (6,501 words) - 09:11, 20 September 2010
• Polycarbonate
  <tr><td>[[Aromatic hydrocarbon]]s</td><td bgcolor="#ffcccc">Poor</td></tr> <tr><td>[[Haloalkane|Halogenated Hydrocarbons]]</td><td bgcolor="#ffffcc">Good-poor</td></tr>
  20 KB (2,772 words) - 09:11, 20 September 2010
• Polyethylene
  ...inked polyethylene) usually can be dissolved at elevated temperatures in [[aromatic hydrocarbon]]s such as [[toluene]] or [[xylene]], or in chlorinated solvent
  20 KB (2,802 words) - 09:11, 20 September 2010
• Creosote
  ...from crude coke oven tar, and is mainly composed of [[polycyclic aromatic hydrocarbons]] (PAHs), but also contains [[phenol]]s and [[cresols]].
  10 KB (1,614 words) - 09:12, 20 September 2010
• Bitumen
  ...arbon disulfide]], and composed primarily of highly condensed [[polycyclic aromatic hydrocarbon]]s. ...trophysics)|accretion]] of the Earth and reworked by bacteria that consume hydrocarbons.
  13 KB (1,945 words) - 09:12, 20 September 2010
• Petroleum
  ...emperature and pressure|pressure and temperature conditions]], the lighter hydrocarbons [[methane]], [[ethane]], [[propane]] and [[butane]] occur as gases, while t ...e and pressure are higher than at the surface, the gas may contain heavier hydrocarbons such as [[pentane]], [[hexane]], and [[heptane]] in the [[gaseous state]].
  69 KB (9,885 words) - 09:12, 20 September 2010
• Polystyrene
  ...tandard '''PS''', is an [[Aromaticity|aromatic]] [[polymer]] made from the aromatic [[monomer]] [[styrene]], a liquid [[hydrocarbon]] that is commercially manu ...y (1908–1985) developed pre-expanded PS beads by incorporating aliphatic hydrocarbons, such as pentane. These beads are the raw material for moulding parts or ex
  36 KB (5,017 words) - 09:14, 20 September 2010
• Wax
  ...ted of n- and isoalkanes, naphthenes, and alkyl- and naphthene-substituted aromatic compounds. The degree of branching has an important influence on the proper
  11 KB (1,689 words) - 09:17, 20 September 2010
• Polyphenyl ether
  ...</ref>. Physical properties of a particular PPE depend upon the number of aromatic rings, their substitution pattern, and whether it is an ether or a thioethe ...s disproportionate to form smaller hydrocarbon molecules as well as larger hydrocarbons molecules. This is reflected by increased evaporation loss, lowering of th
  18 KB (2,654 words) - 09:18, 20 September 2010
• Lubricant
  ...synthetic lubricants]], with group III frequently described as synthesised hydrocarbons, or SHCs. In [[Europe]], only Groups IV and V may be classed as synthetics. * Aromatic
  32 KB (4,626 words) - 09:18, 20 September 2010
• Aromatic amine
  ..., -[[nitrogen|N]][[hydrogen|H]]- or [[nitrogen]] group(s) attached to an [[aromatic hydrocarbon]], whose structure usually contains one or more [[benzene ring] ...when protonated, usually have lower pKa's (are more acidic) than their non-aromatic analogs. This is due to the delocalization of the lone pair of electrons f
  1 KB (181 words) - 12:12, 20 September 2010

View (previous 20 | next 20) (20 | 50 | 100 | 250 | 500)