ABSTRACT
Abstract-Multilayer films from poly(tetrafluoroethylene) (PTFE) and poly(ethylene terephthalate) (PET) were produced using an adhesive layer consisting of ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA) terpolymer and low density polyethylene (LDPE) blend. The surfaces of PTFE were chemically modified by Na/naphthalene treatment and subsequent acrylic acid grafting. FT-IR and XPS measurements were performed to characterize the modified PTFE surfaces. These analyses showed defluorination and oxidation of the modified PTFE surface, and confirmed the acrylic acid grafting. To measure the adhesion strength between PET and modified PTFE, multilayers were subjected to T-peel tests. Peel strength increased with respect to increasing E-MA-GMA amount in the adhesive layer. Prolonging the time of Na/naphthalene treatment improved the peel strength for multilayers of both acrylic acid grafted and ungrafted PTFE. Scanning electron microscopy (SEM) analysis showed that the texture of the PTFE surface after modifications became rougher when compared to untreated PTFE.
