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Encyclopedia > Monomer

A monomer (from Greek mono "one" and meros "part") is a small molecule that may become chemically bonded to other monomers to form a polymer [1]. 3D (left and center) and 2D (right) representations of the terpenoid molecule atisane. ... For other uses, see Chemistry (disambiguation). ... A polymer (from Greek: πολυ, polu, many; and μέρος, meros, part) is a substance composed of molecules with large molecular mass composed of repeating structural units, or monomers, connected by covalent chemical bonds. ...

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Synthetic polymers

Examples of monomers are hydrocarbons such as the alkene and arene homologous series. Here hydrocarbon monomers such as phenylethene and ethene form polymers used as plastics like polyphenylethene (commonly known as polystyrene) and polyethene (commonly known as polyethylene or polythene). Other commercially important monomers include acrylic monomers such as acrylic acid, methyl methacrylate, and acrylamide. Look up Hydrocarbon in Wiktionary, the free dictionary. ... This article is about the chemical compound. ... An aromatic hydrocarbon (abbreviated as AH) or arene [1] is a hydrocarbon, the molecular structure of which incorporates one or more planar sets of six carbon atoms that are connected by delocalised electrons numbering the same as if they consisted of alternating single and double covalent bonds. ... In chemistry, a homologous series is a series of organic compounds with a similar general formula, possessing similar chemical properties due to the presence of the same functional group, and shows a gradation in physical properties as a result of increase in molecular size and mass (see relative molecular mass). ... C8H8 redirects here. ... Ethylene or ethene is the simplest alkene hydrocarbon, consisting of two carbon atoms and four hydrogens. ... For other uses, see Plastic (disambiguation). ... For other uses, see Polystyrene (disambiguation). ... Polyethylene or polyethene is one of the simplest and most inexpensive polymers. ... This article does not cite any references or sources. ... Polyethylene or polyethene is one of the simplest and most inexpensive polymers. ... Acrylic acid or prop-2-enoic acid is a chemical compound with the formula C3H4O2 and structure (which is sometimes abbreviated as CH2=CHCOOH). ... Methyl methacrylate is a chemical compound mostly known as monomer for the production of the transparent plastic polymethyl methacrylate (PMMA). ... R-phrases , , , , , , , S-phrases , Flash point 138 °C Autoignition temperature 424 °C Except where noted otherwise, data are given for materials in their standard state (at 25 Â°C, 100 kPa) Infobox disclaimer and references The chemical compound acrylamide (acrylic amide) has the chemical formula C3H5NO. Its IUPAC name is 2...


Natural polymers

Amino acids are natural monomers, and polymerize to form proteins. Glucose monomers can also polymerize to form starches, amylopectins and glycogen polymers. In this case the polymerization reaction is known as a dehydration or condensation reaction (due to the formation of water (H2O) as one of the products) where a hydrogen atom and a hydroxyl (-OH) group are lost to form H2O and an oxygen molecule bonds between each monomer unit. This article is about the class of chemicals. ... An example of alkene polymerisation, in which each Styrene monomer units double bond reforms as a single bond with another styrene monomer and forms polystyrene. ... A representation of the 3D structure of myoglobin showing coloured alpha helices. ... Glucose (Glc), a monosaccharide (or simple sugar), is an important carbohydrate in biology. ... Starch (CAS# 9005-25-8, chemical formula (C6H10O5)n,[1]) is a mixture of amylose and amylopectin (usually in 20:80 or 30:70 ratios). ... Amylopectin is a highly branched polymer of glucose found in plants. ... Glycogen Structure Segment Glycogen is a polysaccharide of glucose (Glc) which functions as the primary short term energy storage in animal cells. ... An example of alkene polymerisation, in which each Styrene monomer units double bond reforms as a single bond with another styrene monomer and forms polystyrene. ... A condensation reaction is a chemical reaction in which two molecules or moieties combine to form one single molecule, together with the loss of a small molecule. ... Impact from a water drop causes an upward rebound jet surrounded by circular capillary waves. ... This article is about the chemistry of hydrogen. ... // Hydroxyl group The term hydroxyl group is used to describe the functional group -OH when it is a substituent in an organic compound. ... General Name, symbol, number oxygen, O, 8 Chemical series nonmetals, chalcogens Group, period, block 16, 2, p Appearance colourless (gas) colourless (liquid) Standard atomic weight 15. ...


Molecular weight

The lower molecular weight compounds built from monomers are also referred to as dimers, trimers, tetramers, quadramers, pentamers, octamers, 20-mers, etc. if they have 2, 3, 4, 5, 8, or 20 monomer units, respectively. Any number of these monomer units may be indicated by the appropriate prefix, eg, decamer, being a 10-unit monomer chain or polymer. Larger numbers are often stated in English in lieu of Greek. Polymers with relatively low number of units are called oligomers. Sucrose, or common table sugar, is composed of glucose and fructose. ... In chemistry a trimer is a reaction product of three identical molecules. ... In chemistry, an oligomer consists of a finite number of monomer units (oligo is Greek for a few), in contrast to a polymer which, at least in principle, consists of an infinite number of monomers. ...


See also

In chemistry, an oligomer consists of a finite number of monomer units (oligo is Greek for a few), in contrast to a polymer which, at least in principle, consists of an infinite number of monomers. ... Sucrose, or common table sugar, is composed of glucose and fructose. ... A polymer (from Greek: πολυ, polu, many; and μέρος, meros, part) is a substance composed of molecules with large molecular mass composed of repeating structural units, or monomers, connected by covalent chemical bonds. ... An example of alkene polymerisation, in which each Styrene monomer units double bond reforms as a single bond with another styrene monomer and forms polystyrene. ... This is a list of important publications in chemistry, organized by field. ...

External links

  • Polymer Structure

References

  1. ^ Introduction to Polymers 1987 R.J. Young Chapman & Hall ISBN 0-412-22170-5

  Results from FactBites:
 
Si Monomer Traps on Si(001) (425 words)
The single-dimer-wide island in the upper right (arrow) appears as a broad band in the filled states and as two thinner stripes in the empty states.
Individual monomers can be seen in the empty states images bound at the end of the rebonded-SB dimer rows.
Monomers (labeled "M") can become trapped at the ends of rebonded-SB type dimer rows with a binding activation barrier of ~1.0 eV.
Monomer Summary (1362 words)
Monomers are the single repeating units of any polymer (which means "many members.") For example, styrene is the monomer from which polystyrene polymers are produced and vinyl chloride is the monomer of polyvinyl chloride (or PVC).
A monomer is a an organic molecule that is involved in polymerization reactions.
Examples of monomers are hydrocarbons such as the alkene and arene homologous series.
  More results at FactBites »

 
 

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