71. Terylene is a/an
addition polymer
poly amide
homopolymer
none of these
✅ The correct answer is option D.
Polymer Technology MCQs
72. Diphenylamine is added to rubber to
valcanise it.
protect it from deterioration on exposure to air.
make it non-inflammable.
make it thermosetting.
✅ The correct answer is option B.
73. Visco-elastic behaviour exhibited by plastics is a __________ like behaviour.
solid
liquid
combination of solid & liquid
neither solid nor liquid
✅ The correct answer is option C.
74. 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
nylon-66
teflon
polyester
bakelite
✅ The correct answer is option B.
75. Gutta parcha rubber is
soft & tacky at room temperature.
an isomer of natural rubber.
a thermosetting resin.
recovered by coagulation of rubber latex.
✅ The correct answer is option B.
77. Elastomers are
thermosetting material.
exemplified by protein derivatives.
having high flexural strength.
having very high tensile strength and heat resistance.
✅ The correct answer is option C.
78. Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding
glycerol
nitro cellulose
camphor
none of these
✅ The correct answer is option C.
79. Styrene butadiene rubber (SBR) is never used for making
coated fabrics
front wheel tyres of aeroplanes (i.e., heavy duty tyres)
gaskets
soles of shoes
✅ The correct answer is option B.
80. Which of the following is generally not used as eord for synthetic rubber tyre casing ?
Dacron
Nylon
Cellulose
None of these
✅ The correct answer is option C.