Which of the following polymers has the tendency of decomposing before melting? PVC None of these Nylon Polystyrene TRUE ANSWER : ? YOUR ANSWER : ?
Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins. Melamine formaldehyde Epoxy Phenol formaldehyde Urea formaldehyde TRUE ANSWER : ? YOUR ANSWER : ?
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 Polyester Teflon Nylon-66 Bakelite TRUE ANSWER : ? YOUR ANSWER : ?
Thermocole is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten Polyurathane Polystyrene Saturated polyester Either B or C TRUE ANSWER : ? YOUR ANSWER : ?
Poly tetra flouro ethylene (PTFE) is known as Celluloid Bakelite Teflon Dacron TRUE ANSWER : ? YOUR ANSWER : ?
The main use of butadiene is As an anti-skimming agent in paint In the manufacture of synthetic rubber None of these As a plasticiser for unsaturated polyester TRUE ANSWER : ? YOUR ANSWER : ?
Glyptal used in the manufacture of paints & lacquers is a __________ polymer. Polyacrylonitrile Polystyrene Polyester Polyamide TRUE ANSWER : ? YOUR ANSWER : ?
__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate. Leathery Fibrous Rubbery Hard TRUE ANSWER : ? YOUR ANSWER : ?
Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent. 1000-1500 1-1000 1500-2000 2000-2500 TRUE ANSWER : ? YOUR ANSWER : ?
Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its Weathering characteristics Elasticity Strength Plasticity TRUE ANSWER : ? YOUR ANSWER : ?