engleski

X-ray diffraction of polymers

X-ray diffraction was used to determine various structural characteristics of polymers: fine crystalline structure of semicrystalline polymers (defined with unit cell), mesostructure of liquid crystalline polymers, inter- and intramolecular distances in amorphous polymers, structural characteristics of polymers at supermolecular level (shape, size and packing of entities), texture (orientation), and structural phase characteristics (qualitative (identification) and quantitative (degree of crystallinity) phase analysis as well as crystallite size). Determined structural entities (units and elements) might be completed with structural characteristics determined by other methods. Therefore, the knowledge of proper meaning and relation between structural entities at different structural levels could be very important in order to avoid misunderstandings. Nowadays terminology of polymer structure is a result of historical development and interleaving of many other influencing factors. Accordingly, some structural terms accumulated with time multi-valued meanings like core-shell structure, fibril, microstructure, phase structure, texture, etc. On the other side, terms like macrostructure – supermolecular structure - supramolecular structure – superstructure – microstructure – morphology – phase morphology - phase structure – texture seemed to interfere partially or entirely to each other. Additional mix up arose from fact that some terms were multivalued and interfered with other terms at the same time.

X-ray diffraction; Polymer structure; Terminology

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