This book with software provides powerful tools for the analysis, prediction and creation of new polymer blends, an area of significant commercial potential. The authors explore and describe the use of association models to treat hydrogen bonding in polymer mixtures, illustrating its broad utility. They adapt this approach to a description of the phase behavior of polymer mixtures then develop spectroscopic methods that provide an independent measurement of the equilibrium constants. The companion set of computer programs calculate and display many of the important quantities described in the book.