Basic principles of solution
Standard solution: The standard solution is the solution whose concentration is known and does not change on standing A known weight of the solute/ substance dissolved in a known volume of solution. Moles: The number of grams of
What are liquid crystal polymers?
Liquid crystal polymers (LSP) are a polymer that, under suitable conditions of temperature, pressure and concentration, shows a liquid – crystalline mesosphere (one –or two-dimensional, long-range ordered orientation) either in the melt (thermotropic LSP) or in solution
How composite materials are used as industrial materials?
Composite materials have industrial applications- Hybrid composites are used in lightweight transport structural components like boat hulls, aeroplanes etc and lightweight orthopaedic components. Sandwich panels are commonly used in aircraft wings, in roofs walls and floors of
How are LSP classified?
Thermotropic LSP shows different phases depending on the temperature these are classified as- Nematic: It is the most common LC phase; nematic is a geek word meaning thread. In nematic phase, the calamity or shaped organic molecules
What are biodegradable polymers?
Bio-degradable polymers are polymers prone to degradation by the catalytic activity of enzymes, accompanied by lowering of their molar mass. Biodegradable poly(alkylene dicarboxylate)s derived from biobased monomers have an additional interest as above indicated and specifically those
How is conducting polymers classified?
Conducting polymers are classified : Intrinsically conducting g polymers It is a polymer whose structural frame has delocalized electron-pair (conjugated π –bonds) or residual charges. In, an electric field the delocalized π electrons get excited and are
Properties of conducting polymers
Properties of conducting polymers They are light in weight. They have the good mechanical strength. They are easy to process. They have a high charge to mass ratio. The polymers chain s that there is shows conjugation
What are the functions of a lubricant?
The factions of lubricants are as follows- It reduces frictional; resistance between metallic surfaces. It reduces maintenance and running cost of machines. It reduces local heating of sliding metal shut down conditions by avoiding direct contact with
Difference between cloud point and pour point
The difference between cloud point and pour point are as follows- Cloud point Pour point When an oil sample cooled slowly, the temperature at which it appears hazy or cloudy is known as cloud point. The temperature
What is steam emulsification number
Steam emulsification number is the time (in seconds ) required for an emulsion of lubricating oil and water to separate into distinct layers at 900C. Emulsification is the properly of oil to get mixed with water forming