101. Phosphates (e.g., triceresyl, tributyl, tetrabutyl, tripheyl etc.) are added to polymers to act as
hardeners
anti-shrinkage agents
plasticisers
transparency improver
✅ The correct answer is option C.
Polymer Technology MCQs
102. Polymerisation process in which two or more monomers of chemically different nature take part is called
copolymerisation
addition polymerisation
chain polymerisation
none of these
✅ The correct answer is option A.
103. Dacron is a
condensation polymerisation product of hexamethylene diamine and adipic acid.
condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol.
thermosetting material.
none of these.
✅ The correct answer is option D.
104. Ion exchange resins are made of
lucite
sulphonated bakelite
polystyrene
teflon
✅ The correct answer is option B.
105. Flexible foam (for mattresses) are usually made of
PVC
silicone rubber
polyurethanes
polyamides
✅ The correct answer is option C.
106. The major component of acrylic fibres is
polyamides
polyolefins
polyacrylonitrile
polyesters
✅ The correct answer is option C.
107. The rate controlling step in the manufacture of silicone rubber is the
polymer termination step.
condensation of siloxane to silicone.
initial hydrolysis of silicone monomer.
none of these.
✅ The correct answer is option C.
108. Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.
acrylic
polyester
nylon 6:6
polypropylene
✅ The correct answer is option A.
109. Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800 ?
50000
51600
49200
50800
✅ The correct answer is option A.
110. Flexible plastic pipes are made of
high density polyethylene (HDPE).
low density polyethylene (LDPE).
polypropylene.
unsaturated polyester.
✅ The correct answer is option B.