plastic resin properties

Neoprene is superior to natural rubber because of the following properties: Neoprene is non-inflammable but natural rubber is inflammable Neoprene is resistant to oils, organic solvents, petrol and grease. Natural rubber swells and rots in contact with these materials Neoprene is..

It is a white powder When mixed with water, it forms a plastic mass. After about half an hour, this mass sets into a hard solid mass constituting interlaced gypsum crystals. The volume slightly expands (about-1%) during setting. Because of this it is used in making casts for toys..

Property Rhombic Monoclinic plastic Color Yellow Yellow Dark yellow or amber Shape Octahedral Needle shaped No definite shape Specific gravity 2.05 1.93 1.95 Melting point Nil 118.6°C Not definite Solubility Solub..

X-Rays follow a rectilinear propagation and travel with a velocity of 3 x 10 8 ms - 1 in vacuum. They are not deflected by electric and magnetic field. Since they do not contain any charge but are diffracted by crystals, X-rays cause fluorescence when incident on certain materials such as barium..

Static Electricity - Static electricity was known to people more than 2500 years ago. The Greeks knew about the attractive property of the resin amber. They knew that by rubbing amber with cloth, it could be made to attract small feathers. The Greek name for amber was 'elektron'..

Some halides of carbon find wide use in industry. For example, Carbon tetrachloride is used as a fire extinguisher under the name pyrene. Carbon tetrachloride is a common solvent for plastics, resins etc. Freon (CF 2 Cl 2 ) is used as a refrigerant..

Static electricity was known to people more than 2500 years ago. The Greeks knew about the attractive property of the resin amber. They knew that by rubbing amber with cloth, it could be made to attract small feathers. The Greek name for amber was 'elektron..

is the process of formation of large molecules or macromolecules with high molecular weight from small molecules. 'Poly' means many and 'meros' means parts in Greek. The simple compounds from which these macromolecules are made are called monomers . When two monomers combine, a dimer is got. The ..

It is believed that around 2000 BC the Chinese had already discovered the magnetic property of natural iron ore. In a part of Turkey formerly called Magnesia, there are deposits of an iron one which has the property of attracting iron. As this ore was discovered by Greeks they c..

Polymers are macro-sized molecules of relatively high molecular mass, which find extensive use in our daily life. Polymers are large but single chain-like molecules in which the repeating unit derived from small molecules called monomers are covalently linked. Structurally, they are characterized b..