You Do Need power plug adapter while traveling from Denmark to Dominican Republic.

Here is Why You Need An Adapter

The outlet and plug type used in Dominican Republic are A, B and C and in Denmark are C, E, F and K. This is how they look like.

Denmark

In Denmark, outlets of type C, E, F and K are in use.

Type C

Type E

Type F

Type K

Dominican Republic

In Dominican Republic, outlets of type A, B and C are in use.

Type A

Type B

Type C