Low Density Cellular Plastics: Physical Basis of Behaviour

ISBN-13: 9780412584107 / Angielski / Twarda / 1994 / 369 str.

N. C. Hilyard; A. Cunningham; N. C. Hilyard

Opis

Foams are gas filled integral structures in which the gas is finely dispersed throughout acontinuouslyconnected solid phase. The bulk density is usually substantially lower than that of the solid component, and for the foams which form the focus for this book the volume fraction of the gas phase is considerably greater than 0.5 and in most instances in excess of 0.9. Many ofthe materials encountered in every day experience, such as bread, plants and trees, structural materials for buildings, comfort materials for domestic and automotive seating, shock absorbers or car bumpers and materials for noise control, have one thing in common - the cellular nature of their physical structure. Whyare thesestructuressoimportantin the naturaland man-made world? The reasons are both technical and commercial. From a technical viewpoint cellular materials offer: 1. high specific stiffness and strength - making them suitable for structural applications; 2. closeto idealenergymanagement - hencetheir useinthermalandacoustic insulation, vibration damping, acoustic absorption and shock mitigation; and 3. comfort - hence their use for domestic and automotive seating.

Recenzje

The book will be of major interest to polymer or materials scientists concerned with properties and applications of low density cellular polymers. Polymer International

Spis treści

Physical behaviour of polymeric foams - an overview. Polyurethane flexible foam formation. Characterization of polymeric cellular structures. The morphology of flexible polyurethane matrix polymers. Heat transfers in foams. Thermal ageing. The elastic behaviour of low density cellular plastics. Hysteresis and energy loss in flexible polyurethane foams. Impact response. Acoustical characteristics of low density foams.