| Abstract: | A proposal for the solid‐state structure of poly(p‐phenylene isophthalate) with oxydecylperfluorodecyl side chains is presented, which was calculated by the new Rietveld refinement program BGMN®. A triclinic unit cell with a = 0.575 nm, b = 4.06 nm, c = 2.1 nm, α = 91.2°, β = 85.7°, and γ = 66.1° was obtained using space group symmetry P1¯ (No. 2) with Z = 2. All fractional atom coordinates, reflections and structure factors F were determined. The results show that highly occupied netplanes lie in plane and perpendicularly to the side chains. It may be supposed that these net planes will form the low‐energy surface of the polymer. © 2000 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 38: 1617–1625, 2000 |
