A terminal group, also known as an end group, is a functional group or atom located at the end of a polymer chain. Terminal groups can influence the properties and reactivity of polymers. They can be used to functionalize polymers, initiate further polymerization, or participate in crosslinking reactions.

端基，也称为端基，是位于聚合物链末端的官能团或原子。端基会影响聚合物的性质和反应性。它们可用于使聚合物官能化、引发进一步的聚合或参与交联反应。