Neoprene is a___________________?
Neoprene is a___________________?
A. Monomer
B. Synthetic rubber
C. Polyester
D. None of these
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Epoxy resins (i.e., epoxide polymers) ?
Epoxy resins (i.e., epoxide polymers) ?A. Are made by addition polymerisation reaction only
B. Contain an epoxy group (fig bellow) at the ends of the polymer
C. Are cross-linked polymers only
D. Use emulsion polymerisation methodsPoly-tetra-fluoro ethylene (PTFE) is known as_________________?
Poly-tetra-fluoro ethylene (PTFE) is known as_________________?A. Dacron
B. Teflon
C. Bakelite
D. CelluloidMelamine formaldehyde resin which has a very high anti tacking properties, is not used for the ___________________?
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 laminatesThe monomer for the production of neoprene rubber is_________________?
The monomer for the production of neoprene rubber is_________________?A. Acetylene
B. Chloroprene
C. Isoprene
D. None of theseThermocol is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten__________________?
Thermocol is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten__________________?A. Saturated polyester
B. Polyurethane
C. Polystyrene
D. Either B. or C.Polystyrene is a ____________ plastic at room temperature?
Polystyrene is a ____________ plastic at room temperature?A. Ductile
B. Brittle
C. Malleable
D. None of these