Editing Copolymer (section)

=== Copolymer engineering ===
Copolymerization is used to modify the properties of manufactured plastics to meet specific needs, for example to reduce crystallinity, modify [[glass transition temperature]], control wetting properties  or to improve solubility.<ref>{{Cite journal | doi = 10.1002/ppap.201700053| title = Tunable wettability and pH-responsiveness of plasma copolymers of acrylic acid and octafluorocyclobutane| journal = Plasma Processes and Polymers| volume = 14| issue = 10| pages = 1700053| year = 2017| last1 = Muzammil| first1 = Iqbal| last2 = Li| first2 = Yupeng| last3 = Lei| first3 = Mingkai| s2cid = 104161308}}</ref> It is a way of improving mechanical properties, in a technique known as [[rubber toughening]]. Elastomeric phases within a rigid matrix act as crack arrestors, and so increase the energy absorption when the material is impacted for example. [[Acrylonitrile butadiene styrene]] is a common example.