Poly (ε-caprolactone)(PCL)-based macromonomers and the corresponding substituted polyphenylene polymers have been synthesized in various chemical structures. The effect of chemical structure and the crystallization of PCL on the resulting morphology in thin films have been investigated. PCL macromonomers containing the central 2, 5-dibromo-1, 4- phenylene moiety were synthesized by ring-opening polymerization (ROP). Poly ( ...