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Zusatztext 'As a whole, the book is impressive. The author brings together a huge amount of literature to provide a coherent and comprehensive account of the research area as it stands today.' Informationen zum Autor Douglas L. Dorset is Senior Research Associate at ExxonMobil Research and Engineering Company in Annandale, New Jersey, USA. Klappentext How do mixtures of differently sized and shaped molecules form the plastic solids known as waxes? Firstly, the book considers the characteristic crystalline assemblies of important wax ingredients; secondly, it looks at assemblies of two separate components and finally, based on the rules derived from the first two studies, it shows how plausible molecular models for several types of wax can be constructed. Zusammenfassung By considering the solid state packing of linear chain wax components, this book aims at understanding three things: firstly, which modifications of molecular components are allowed for maintaining stable solid solutions; secondly, what happens when stability conditions are traversed and fractionation begins and thirdly, the structure of fractionated arrays. The co-compatibility of molecular ingredients is considered in terms of their shapes and relative sizes, following an approach originally proposed by Kitaigorodskii. As demonstrated profusely by the crystal structures of pure component types (e. g. alkanes, fatty alcohols, fatty acids, long chain esters, cholesteryl esters) and insertion of functional groups (e. g. chain branches, unsaturation, heteroatoms), characteristic molecular packing arrays provide important geometric information for understanding the co-packing of different molecules in mixtures. Single crystal and spectroscopic data from polydisperse arrays can then be evaluated to arrive at plausible structures of solid solutions and fractionated systems. The resultant structures are not only relevant to the understanding of so-called waxes but also include certain classes of polymers. The ramifications of this work extend into any solid state array of polymethylene chains, including lipid foodstuffs. Inhaltsverzeichnis 1: Polydispersity of the paraffin chain: statement of the problem 2: Layer packing of polymethylene chains 3: Crystal structures and phase transitions of the paraffins 4: Thermotropic disorder in n-paraffin crystals 5: Binary and multicomponent solids of n-paraffins 6: Some functional substitutions in n-paraffins 7: Lipid alcohols 8: The fatty acids 9: Linear fatty acid esters 10: The cholesteryl esters 11: From waxes to polymers: the crystallography of polydisperse arrays ...
