Poly(epsilon-caprolactoen)-poly(fluoroalkylene oxide)-poly(epsilon-caprolactone)block coplymers as surface modifiers of poly(vinyl chloride)

摘要

Blends of poly(epsilon-caprolactone)-poly(fluoroalkylene oxide)_poly(epsilon-caprolactone)(PCLPFPE-PCL)triblock copolymers (with different length of PFPE and PCL segments) and poly(vinyl chloride) (PVC) were prepared by casting from tetrahydrofuran solution.DSC analysis revealed a complex morphology deriving form miscibility between PCL and PVC segments.XPS analysis showed strong surface enrichment of PEPE segments for all films prepared.Treatment with a PFPE selective solvent showed that the fraction of PCL-PFPE-PCL removed from surface decreased with increasing length of PCL blocks,indicating an anchorage effect by PCL segments with respect to PVC matrix.