Monomer: Difference between revisions
| Line 5: | Line 5: | ||
Here hydrocarbon monomers such as [[phenylethene]] and [[ethene]] form polymers used as [[plastic]]s 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]]. |
Here hydrocarbon monomers such as [[phenylethene]] and [[ethene]] form polymers used as [[plastic]]s 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]]. |
||
HELLO ALLL PEOPLE |
|||
==Natural monomers== |
|||
[[Amino acid]]s are natural monomers, and [[polymerization|polymerize]] to form [[protein]]s. [[Glucose]] monomers can also polymerize to form [[starch]]es, [[amylopectin]]s and [[glycogen]] polymers. In this case the [[polymerization]] reaction is known as a dehydration or [[condensation reaction]] (due to the formation of [[water]] (H<sub>2</sub>O) as one of the products) where a [[hydrogen]] atom and a [[hydroxyl]] (-OH) group are lost to form H<sub>2</sub>O and an [[oxygen]] molecule bonds between each monomer unit. |
|||
==Molecular weight== |
==Molecular weight== |
||
Revision as of 02:38, 3 March 2009
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][clarification needed]
Synthetic monomers
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.
HELLO ALLL PEOPLE
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. [2] 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.
See also
Notes
- ^ Introduction to Polymers 1987 R.J. Young Chapman & Hall ISBN 0-412-22170-5
- ^ Campbell, Neil A. (2006). Biology: Exploring Life. Boston, Massachusetts: Pearson Prentice Hall. ISBN 0-13-250882-6.
{{cite book}}: Unknown parameter|coauthors=ignored (|author=suggested) (help)