FOREWORD. We are indeed very happy to present engineering chemistry book for diploma engineers. Chemistry is the branch of science that deals with the. Check Out Engineering Chemistry 1st Year Notes Pdf Free Download. Engineering Chemistry of Wiley India Pvt. Ltd., Vairam and others, edition. Depends on the Engineering Chemistry book you want to use/refer to. If you are studying in AU I suggest you ask your chemistry teacher directly or any of the.
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A thorough knowledge of their flow characteristics in terms of temperature and shearing stress is imperative. A knowledge of the latter variable is vitally important in that most thermoplastics are pseudo-plastic, Le. Rheological measurements assist in the study of degradation of high polymers.
The experimental data gathering technique is quite simple.
The results have much theoretical as well as practical significance. Other information, such as molecular weight and molecular shape of polymer molecules, can be derived from investigations of viscosity of dilute polymer solutions. A more complex field in rheological measurements is the study of time-viscosity behavior of materials.
Materials exhibit many anomalies in flow behavior. People who study latex paints or printing inks are very much aware of the significance of this type of rheological measurement. Rheology has quite a few applications in the biochemistry field.
The study of the flow of body fluids and properties of secretions, such as intra-ocular fluid and spinal fluid, is growing in importance. The theoretical prediction of viscosity of dilute solutions has received much recent interest.
Much has been published on prediction of rheological properties of dilute solutions of high polymers. Problems in Viscosity Measurement No single instrument should be chosen without careful consideration of the range of measurement needed and the type of flow of the material.
Materials may range in viscosity from a fraction of a poise to billions of poises. Typical examples are: hydrogen, poise ; water and alcohol, oils, varnishes, and paints, 10 to lo2; fats and greases, 10 to ; resins and gums, lo3 to ; pitches, asphalts, thermoplastics, lo4to 10l2or greater. The range of viscosity encountered with a given material with temperature change, for example, creates another problem which necessitates making a series of measurements with several different instruments in order to sufficiently characterize the material.
Choice of measuring instrument also depends on type of flow. Viscosity of some materials is independent of shear rate, that of others will vary-up or down-not only with shear rate but also as a function of duration of shear application at a given level.
Electrochemistry Electrochemical Cells Phase Rule Colloids Transition Metal Chemistry Metallurgy Adhesives Explosives and Propellants Water Treatment Fuels and Combustion Silicate Te3chnology Polymers Paints Solid State Chemistry Chromatography Instrumental methods of Analysis Photochemistry Role of Metals in Biology Pollution Prevention and Waste Minimisation.
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Related Topics. Fundamentals of Engineering Chemistry: As Per the New Syllabus, B.
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