ESCA (Electron Spectroscopy for Chemical Analysis) Investigation of a Poly(Oxyethylene)-co-(Pivalolactone) Telechelomer.

摘要

We are in the process of synthesizing and characterizing segmented copolymers containing poly(oxyethylene) and poly(pivalolactone) segments of very narrow molecular weight distributions. The surface energies of the two segments coupled with good phase separation should result in poly(oxyethylene) being found on the surface of the copolymer. Poly(oxyethylene)-co-(pivalolactone) telechelomer, which is the precursor to the segmented copolymer, is used as a model to develop an ESCA method for surface analysis. An angular resolution study shows that negligible amounts of poly(pivalolactone) segments are present near the surface. Core level spectra of the telechelomer and its model compounds will be presented to indicate that poly(oxyethylene) segment is richer near the surface. Keywords: X ray photoelectron spectroscopy; ESCA(Electron Spectroscopy for Chemical Analysis). Reprints. (aw)