蛍光X線分析によるテトラフルオロエチレン/パーフルオロ-(プロピルビニルエーテル)共重合体中の共重合成分の定量

概要

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A quantitative analysis of an oxygen-containing co-monomer in organic copolymers by an XRF oxygen analysis was investigated. An X-ray fluorescence spectrometer was equipped with a diffraction device having synthetic multilayers (2d=8.06nm) and a gasflow proportional counter as a detector for the O K_α line with a 0.6μm polyester film window. The X-ray tube was used with a large current under low potential (40kV-70mA); the intensities of the O K_α peak (2θ=34.325°) and those of the background (2θ=33.00,36.03°)were measured three times for 100s and 3 times for 50s, respectively. A calibration curve was constructed based on the oxygen contents of tetrafluoroethylene/perfluoro(propylvinyl ether) copolymer, determined by the IR method. It showed good linearity over an oxygen content range of 0.1〜2% (1〜10mol% as co-monomer); the relative standard deviation was 2.7% for seven measurements of a 1.12% oxygen-containing polymer. A rapid, nondestructive determination method of an oxygen-containing co-monomer by XRf was thus established.
1992-11-05