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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.
explaination of weak acid vs weak base titration
The property of a material by which it can be drawn into wires is called as Ductility is the only property of a material by which it can be drawn into wires.
In what important respect does the conductivity of a conductor differ from that of an intrinsic Semiconductor. It is well known that the conductivity of a conductor i
a) List various advantages and drawbacks of using transparent polymeric materials for eyeglass lenses. (b) Cite 4 properties (in addition to being transparent) that are important
A system with constant heat capacity CP and initial temperature T1 is heated by contacting a reservoir at Tf . Find the entropy change of the system, reservoir, and system plus res
In a drying system, 600 m 3 /min of ambient air at 20° C and 50% relative humidity is heated to a temperature of 50°C before passing into the drying chamber. a) What are the spe
petrolium
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to determine the emf of cell uaing pottentiometre
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