Editing Addition polymer (section)

== Polyolefins ==
Many common addition polymers are formed from [[Saturated and unsaturated compounds|unsaturated]] monomers (usually having a C=C double bond).<ref>{{cite web|url=http://chemed.chem.wisc.edu/chempaths/GenChem-Textbook/Addition-Polymers-930.html |archive-url=https://archive.today/20121212083558/http://chemed.chem.wisc.edu/chempaths/GenChem-Textbook/Addition-Polymers-930.html |url-status=dead |archive-date=December 12, 2012 |title=Addition Polymers |accessdate=July 17, 2012 }}</ref> The most prevalent addition polymers are polyolefins, i.e. polymers derived by the conversion of olefins (alkenes) to long-chain alkanes.  The [[stoichiometry]] is simple:
:n RCH=CH<sub>2</sub>  →   [RCH-CH<sub>2</sub>]<sub>n</sub>
This conversion can be induced by a variety of [[catalyst]]s including [[free-radical polymerization|free radicals]], [[cationic polymerization|acids]], [[anionic polymerization|carbanions]] and [[coordination polymerization|metal complexes]].

Examples of such polyolefins are [[polyethene]]s, [[polypropylene]], [[PVC]], [[Teflon]], [[Buna rubber]]s, [[polyacrylate]]s, [[polystyrene]], and [[PCTFE]]. 

===Copolymers===
When two or more types of monomers undergo addition polymerization, the resulting polymer is an addition copolymer. [[Saran wrap]], formed from polymerization of [[vinyl chloride]] and [[vinylidene chloride]], is an addition copolymer.<ref name="Stoker2012">{{cite book|author=H. Stephen Stoker|title=Organic and Biological Chemistry|url=https://books.google.com/books?id=z6o_PO4BhRQC&pg=PA65|accessdate=17 July 2012|date=1 January 2012|publisher=Cengage Learning|isbn=978-1-133-10395-0|page=65}}</ref>