Polymer Technology MCQs

124 MCQs  — Chemical Engineering MCQs  (Page 6 of 13)

Dacron is a _____________________________?
A. Condensation polymerisation product of hexamethylene diamine and adipic acid
B. Condensation polymerisation product of dimethyl terephthalate (dmt) and ethylene glycol
C. Thermosetting material
D. None of these
Thermosetting plastic materials___________________?
A. Can be repeatedly melted
B. Is useful for melt casting
C. Cannot be melted after forming
D. Is useful for spinning
Polyurethane cannot be used to make____________________?
A. Automobile cushion
B. Thermal insulation in refrigerator
C. Coating and adhesive
D. Fibre reinforced plastic (frp)
Polyvinyl chloride (PVC) ____________________?
A. Is produced by polycondensation reaction
B. Uses either emulsion or suspension polymerisation methods
C. Can be made thermosetting by adding a plasticiser
D. Softening temperature is 200°c
Branched chain polymers compared to linear polymers have higher ____________________?
A. Density
B. Tensile strength
C. Melting point
D. Degree of irregularity in atomic packing
Bakelite (phenol-formaldehyde) resin cannot be used as________________?
A. Decorative paint
B. Decorative laminates
C. Electrical insulation
D. Glass reinforced plastics