Related Questions

__________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine.
A Epoxy
B Amino
C Alkyd
D Phenolic
Phenol formaldehyde is produced by condensation polymerisation. It is also known as
A Teflon
B Bakelite
C Polyester
D Nylon-66
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
Bakelite (phenol-formaldehyde) resin can not be used as
A Decorative paint
B Decorative laminates
C Electrical insulation
D Glass reinforced plastics
Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the
A Electrical insulation purpose
B Tanning of leather
C Strengthening of plaster of paris
D Decorative laminates
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
Which of the following polymers belong to the class of formaldehyde resin?
A Melamine resins
B Teflon
C Dacron
D None of these
Phenol formaldehyde resin is used as an adhesive in making
A Laminates
B Card boxes
C Furniture
D Books

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