Characterization and gas-permeation properties of crosslinked diacetylene-containing polymer membranes from ferulic acid

Abstract

Thermally and UV crosslinked poly[propargyl(3-methoxy-4-propargyloxy) cinnamate] (PPOF) were investigated in terms of their physical, thermal, optical, and gas-permeation properties. The crosslinked membranes had high gel contents because of the formation of a diacetylene network. The wide-angle X-ray diffraction patterns showed that all of the membranes were amorphous in structure, regardless of the type of crosslinking reaction. The membrane density increased after the crosslinking reaction; this suggested that the free volume of the crosslinked membrane was lower than that of the untreated membranes. Drastic color changes in the membranes were also observed because of the highly conjugate..