Related Questions

PVC is obtained by the polymerisation of
A Propane
B Vinyl chloride
C Styrene
D Acetylene
Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
A Organic peroxides
B Sulphuric acid
C Hydroflouric acid
D None of these
In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same.
A Semi-batch
B Tubular
C Batch
D Back-mix
In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is
A Terylene
B Polybutadiene
C PVC
D Polypropylene
In condensation polymerisation as compared to addition polymerisation
A The monomers are unsaturated compounds
B No co-product is lost
C The monomers contain two functional groups
D Generally only one monomer is involved
Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is
A Nylon-66
B Teflon
C Polyester
D Bakelite
An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature.
A Is always equal to
B Is always greater than
C Is always less than
D May be greater or less than
Addition of stabiliser during PVC manufacture is done to
A Improve its impact strength
B Improve its elasticity
C Reduce the melt viscosity & glass transition temperature
D Prevent its thermal degradation
Reactor used in the production of polyvinyl chloride (PVC) is made of
A Nickel or glass lined steel
B Aluminium
C Tantalum
D Lead
Addition polymerisation is not involved in the manufacture of
A Low density polythene
B Poly vinyl chloride
C Polystyrene
D Polyhexamethylene adipamide

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