X-Ray Scattering from Non-crystalline and Liquid Crystalline Polymers

摘要: The absence of sharp crystalline peaks in the X-ray scattering pattern a polymer is universally taken as characteristic non-crystalline polymer. It often thought that diffuse such (for example Figure 1) contains no directly useful structural information. sample simply becomes classified ‘amorphous’. This chapter involved with techniques allow us to look beyond classification and extract considerable quantity information from wide-angle (WAXS) patterns liquid polymers. relates chemical configurations chain conformations, molecular packing orientation. concerned describing illustrating methods by which may be obtained. We shall regime, for vectors s > 0.2 A−1 (whereby s = 4πsin θ/λ, where 2θ angle between incident scattered paths λ wavelength, typically 0.79 or 1.54 A) hence evaluating features range 1–100 A. Scattering at lower falls small-angle regime reader directed Chapters 30 32 this volume full description.