Development of a simultaneous measurement system of X-ray diffraction and Raman spectra: Application to structural study of crystalline-phase transitions of chain molecules

Abstract

A bench-top-type system for simultaneous measurement of X-ray diffraction and Raman spectra was developed to investigate structural changes in the phase transitions of chain molecules. A relationship between conformational disordering and rotational motion of molecular chains was detected by comparing two types of data. The structural change in the photoinduced solid-state polymerization of cis,cis-diethylmuconate single crystals was also studied. It was found that the molecular deformation of the polymer chains and lattice strain was induced in the early stage of polymerization reaction.