Polyoxymethylene (POM), also known as polyacetal, is an important engineering plastic with
high crystallinity. While POM is inherently unstable with the existence of hemiformal chain ends,
they undergo depolymerization easily. Therefore, seeking for ways of stabilization is crucial to
researchers. Herein, we present a new method involving an end-capping agent and the process of
extrusion to achieve the terminal stabilization of polyoxymethylene copolymer. This paper aims to
eliminate the labile hemiformal chain ends through reactive extrusion, with MDI as the end-capping
agent to form a thermally more stable structure of carbamate. The thermal stability of this carbamate end-capped polyoxymethylene copolymer has been studied.
