The ring-opening polymerization of alpha-methylene-6-caprolactone (alpha-MCL) is presented for the first time. Poly(alpha-MCL) was characterized by H-1 NMR, GPC, DSC, and MALDI-TOF The ring-opening copolymerization of alpha-MCL with epsilon-caprolactone (epsilon-CL) yields to formation of radically cross-linkable poly(epsilon-CL)s with melting points in the range of 35-54 degrees C depending on the copolymer composition.