You Do Need power plug adapter while traveling from Chile to Martinique.

Here is Why You Need An Adapter

The outlet and plug type used in Martinique are C, D and E and in Chile are C and L. This is how they look like.

Chile

In Chile, outlets of type C and L are in use.

Type C

Type L

Martinique

In Martinique, outlets of type C, D and E are in use.

Type C

Type D

Type E