Category: Polymer Technology

A. Methyl methacrylate
B. DMT
C. Butadiene
D. Tetrafluoroethylene

A. Polypropylene
B. Polystyrene
C. Polyester
D. Polyurethane

A. Cross linked polystyrene
B. Phenol formaldehyde resins
C. Polyesters
D. Polyamides

A. Employs a pressure of 30 kgf/cm2
B. Achieves an yield of 95-98% based on ethylene
C. Produces very low density polythene
D. Does not use any catalyst for polymerisation

A. -20 to 25
B. 50 to 75
C. 100 to 150
D. 250-280

A. Good mechanical strength
B. Low viscosity
C. Low melting point
D. None of these

A. Melamine formaldehyde resin
B. Phenolic resin
C. Epoxy resin
D. Alkyd resin

A. Density
B. Tensile strength
C. Melting point
D. Degree of irregularity in atomic packing

A. Coated fabrics
B. Front wheel tyres of aeroplanes (i.e., heavy duty tyres)
C. Gaskets
D. Soles of shoes

A. Plastics are good conductors of heat and electricity
B. All the polymers are highly crystalline in nature
C. Polymers can be vaporised by heating to a very high temperature
D. The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of
polymerisation