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Explain polymerisation vinyl chloride and its applications.
PVC and its applications - It is acquired from polymerisation of vinyl chloride in the presence of a catalyst as peroxides at about 500C. The properties are as mechanical strength, flexibility, porosity, electrical and moisture absorption properties can be changed through adding certain materials. PVC has fine mechanical and electrical properties. This is hard and brittle. It resists flame, most solvents and sunlight. It is non-hygroscopic. PVC is widely used as insulation and jacketing material for cables and wires. PVC films, sheets and tapes are used as insulation for conduit pipes and dry batteries.
Brazing and Soldering - Both soldering and brazing processes are useful for combination two dissimilar metals. Both brazing alloy and solder have lower melting points than the met
Why protons doesn''t react which each other?
a. Explain the problems of flooding and channeling in packed tower
Ask question #Minimum 100 words accepted.hardness of bore water is less than that of sea water-justify
typesofhardness
Q. How can you measure the refractories and refractoriness under load of a refractory material?
understanding the concept of entrepreneurship and the process of innovation, come out with one assignment per group the used of materials in industry.
Materials used for DC applications are: Iron and low-carbon steels (maximum carbon 0.05 %) • Iron-Nickel alloys (Permalloy) • Iron-Cobalt alloy (Permendur)
The hardness of quenched Martensite is First enhances and then remains almost constant as the carbon percentage enhances.
Free Electron theory of metals This theory tells that, metals conduct electricity due to the presence of free electrons in it. The outermost shells of metal atoms will be loose
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