Rights© 2017 Wiley. Society of Plastics Engineers This is the peer reviewed version of the following article: Tuna B and Benkreira H (2017) Chain extension of recycled PA6. Polymer Engineering & Science. 58(7): 1037-1042, which has been published in final form at http://dx.doi.org/10.1002/pen.24663. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.