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Author Dorset, Douglas L., 1942- author.

Title Crystallography of the polymethylene chain : an inquiry into the structure of waxes / Douglas L. Dorset
Published New York : Oxford University Press, 2005


Description 1 online resource (xii, 232 pages) : illustrations
Series International Union of Crystallography book series ; 17
International Union of Crystallography monographs on crystallography ; 17.
Contents 1 Polydispersity and the paraffin chain-statement of the problem; 1.1 Importance; 1.2 Binary solid state of n-paraffins: early descriptions; 1.2.1 Polymorphism; 1.2.2 Simple phase diagrams; 1.2.3 Stability conditions for binary solid solutions of linear molecules; 1.2.4 Experimental variances to Kitaigorodskii's rules for paraffin solid solutions; 1.3 Summary; 2 Layer packing of polymethylene chains; 2.1 The methylene subcell and layer packing-theoretical considerations; 2.2 Observed methylene subcells; 2.3 Layer stacking; 2.4 Summary
3 Crystal structures and phase transitions of the paraffins3.1 Introduction; 3.2 Crystal structures of lower chain n-paraffins; 3.3 Triclinic crystal structure of longer even-chain n-paraffins; 3.4 Monoclinic crystal structure of the even-chain n-paraffins; 3.5 Orthorhombic crystal structure of the even-chain n-paraffins; 3.6 "Nematocrystalline" modifications; 3.7 Thermodynamically stable orthorhombic crystal structure of the odd-chain n-paraffins; 3.8 Orthorhombic crystal structure of melt-crystallized odd-chain n-paraffins; 3.9 Branched n-paraffins; 3.10 Aromatic substitution of n-paraffins
3.11 Polyethylene and its alkane models3.12 Summary; 4 Thermotropic disorder in n-paraffin crystals; 4.1 Introduction; 4.2 Diffraction and microscopical studies of high temperature chain packing; 4.3 Vibrational spectroscopic measurements of n-paraffins at high temperature; 4.4 Summary; 5 Binary and multicomponent solids of n-paraffins; 5.1 Introduction; 5.2 Solid solutions; 5.2.1 Binary combinations; 5.2.2 Multicomponent solutions; 5.3 Miscibility gap; 5.3.1 Binary combinations; 5.3.2 Multicomponent combinations; 5.4 Eutectic solids-partial co-solubility; 5.5 Eutectic solids-no co-solubility
5.6 Effect of chain-folding on phase separation5.7 Conclusions; 5.8 Summary; 6 Some functional substitutions in n-paraffins; 6.1 Introduction; 6.2 Perfluoroalkanes-crystal structure; 6.3 Perfluoroalkanes-binary phases; 6.4 Heteroatoms in chains-crystal structures; 6.5 Heteroatom substitutions-binary phases; 6.6 Unsaturation; 6.7 Summary; 7 Lipid alcohols; 7.1 Introduction; 7.2 Crystal structure of primary fatty alcohols; 7.2.1 Tilted layer polymorphs; 7.2.2 Rectangular layer polymorph; 7.2.3 Rotator phases; 7.3 Crystal structures of other fatty alcohols and thiols
7.4 Binary phase behavior of fatty alcohols7.5 Crystal structure of cholesterol; 7.6 Thermotropic behavior of cholesterol; 7.7 Examples of binary phase behavior of cholesterol with simple derivatives; 7.8 Summary; 8 The fatty acids; 8.1 Introduction; 8.2 Crystal structures of normal chain fatty acids; 8.2.1 Even-chain acids; 8.2.2 Odd-chain acids; 8.2.3 Very short fatty acids; 8.2.4 Heteroatom substitution; 8.3 Crystal structure of unsaturated fatty acids; 8.4 Crystal structure of cyclopropane-containing fatty acids; 8.5 Crystal structures of branched-chain fatty acids
Summary 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 anapproach originally proposed by Kitaigorodskii. As demonstrated profusely by the crystal structures of pure component type
Bibliography Includes bibliographical references and index
Notes English
Subject Waxes.
Waxes -- Analysis
Polymethylene -- Structure
TECHNOLOGY & ENGINEERING -- Power Resources -- General.
Waxes -- Analysis.
Genre/Form Electronic books
Form Electronic book
ISBN 0198529082