Bücher von M a Radwan

Hydrogel which is also known as super absorbent polymer is a type of polymer whose structure is three dimensional and it is capable of swelling and absorbing large amounts of water. Such absorption of water depends on many factors such as type of the polymer, temperature, pressure, and other factors such as the cross linking density. There are many types of hydrogels around the world. One of these types is Poly (vinyl alcohol) cross linked with aldehyde such as Glutaraldehyde. Another example is Methylene-Bis-Acrylamide cross linked Poly (2-Acrylamide-2-Methyl-1-Propane Sulphonic acid) hydrogel (PAMPS).

Thermal insulation is the ability of the material to prevent or reduce the heat transfer through the insulating material or between thermally contacted objectives. The increasing of the greenhouse effect leads to a continuous rising of the temperature especially in the summer, thus, there is a continuous research that aims to find more effective and environmental friendly insulation materials. Nowadays, a great number of proportions from polyurethane foam are produced every year in order to be used as an insulating material. Polyurethane foam shows an effective heat insulation results, but the price of the polyurethane is getting more expensive. This Book aims to prepare, design and develop effective heat insulation composite based on shredded used automobile tires. Hence, using cheap materials such as shredded used tires, which considered as undesirable waste material, results in both producing a cheap national heat insulating roof tile with good mechanical, waterproofing and thermal insulating characteristics along with solving a serious environmental problem that occurs to get rid of the shredded waste automobile tires.