Crystallography of the Polymethylene Chain
An Inquiry into the Structure of Waxes
Series: International Union of Crystallography Monographs on Crystallography; 17;
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Product details:
- Publisher OUP Oxford
- Date of Publication 9 December 2004
- ISBN 9780198529088
- Binding Hardback
- No. of pages246 pages
- Size 242x163x18 mm
- Weight 569 g
- Language English
- Illustrations numerous line figures and halftones 0
Categories
Short description:
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.
MoreLong description:
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.
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. The overall presentation, including plentiful diagrams and photographs, is excellent - it is a worthy addition to the series.
Table of Contents:
Polydispersity of the paraffin chain: statement of the problem
Layer packing of polymethylene chains
Crystal structures and phase transitions of the paraffins
Thermotropic disorder in n-paraffin crystals
Binary and multicomponent solids of n-paraffins
Some functional substitutions in n-paraffins
Lipid alcohols
The fatty acids
Linear fatty acid esters
The cholesteryl esters
From waxes to polymers: the crystallography of polydisperse arrays
