Advances in Urethane: Science & Technology, Volume XIV

About the Book

Flexible polyurenthane foams of all types are a unique group of plastics materials, characterized by the fact that a multitude of different sets of properties can be obtained by varying the levels of a relatively small number of base components in the formulations. Different foam grades, primarily characterized by density and hardness, can be obtained by changing the ratio between base polyol, polymer polyol, water, blowing agent, isocyanate and other components. It is not uncommon for foam producers in industrialized countries to manufacture more than one hundred different foam grades based on these basic chemicals, plus the ancillary chemicals needed for optimized processing. This has always made flexible polyurethane foams a highly suitable candidate for correlating these variations in the formulations with the resulting properties in a mathematical way, aimed at predicting the properties as accurately as possible, fine-tuning existing grades or designing new foam grades. This book discusses the methodology for obtaining meaningful equations for correlating properties with formulation variables and other influencing factors

Table of Contents:
Mathematical Property Prediction Models for Flexible Polyurethane Foams. Reinhart Schiffauer, ARCO Chemical Company, South Charleston, South Carolina o Methods for Obtaining Mathematical Property Prediction Models o Mathematical Analysis o Transformed Variables o Individual Models for Each Property o Density o Hardness o Mechanical Properties o Resilience o Fatique o Maximum Block Temperature, Conventional Slabstock Foam o Individual Influencing Variables o Correlation of Ancillary Chemicals with the Base Formulation o Recommendations for Future Studies o References The Effective Diffusivity of Cyclopentane and n-Pentane in PU and PUIR Foams by Thin-Slice Gravimetric Analysis. J. Richard Booth and Deb Bhattarcharjee, Dept. of Chemical Engineering, Tennessee Technological University o Purpose o Background o Research Approach o Discussion of Results o Conclusions o Nomenclature o References Scorch Inhibitors for Polyurethane Slabstock Foams. James H. Botkin, Ciba Specialty Chemicals Corp, Additives Division, Tarrytown, NY o Introduction o Chemistry of Scorching in Polyurethane Foams o Test Methods for Polyol Stabilization and Scorch Inhibition o Antioxidant Systems for Polyol Stabilization and Scorch Inhibition o Industry Trends and Antiscorch Systems o Conclusions and Outlook o Acknowledgements o Appendix: List of Antioxidants o References A Novel Architecture for Electro-Optic Polyurethane: Alternating Charge Transporting and Nonlinear Optical Chromophores. Kevin D. Belfield and Suresh R. Sriram, Dept. of Chemistry, University of Detroit Mercy o Introduction o Experimental o Results and Discussion o Conclusions o Acknowledgements o References Advances in Moisture-Curable Siloxane-Urethane Polymers. Janusg Kozakiewicz, Industrial Chemistry Research Institute, Warsaw, Poland o Introductory Remarks o Experimental o Results and Discussion o Further Development of Siloxane-Urethane Polymers o References <

About the Author :

Kurt C. Frisch and Daniel Klempner Polymer Technologies, Inc. University of Detroit