Abstract: Poly(monochloro-p-xylylene) was surface modified using sodium-naphthalene complex, the surface free energy of poly(monochloro-p-xylylene) was measured by the contact angles. The structure and the thermal stability of poly(monochloro-p-xylylene) were characterized by X-ray diffraction(XRD), thermogravimetry(TG), and fourier transform infrared spectroscopy(FTIR). After the modification, the surface free energy and shearing strength increased from 28.64 mJ/m2 to 41.48 mJ/m2 and from 150.5 kPa to 219.5 kPa, respectively. The increasing of the surface energy was mainly due to the reduction of the chlorobenzene.

Key words: poly(monochloro-p-xylylene), sodium-naphthalene complex, modification, surface free energy, surface morphology, film