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.Management Sciences
Category: Polymer Technology
A copolymer is formed by the combination of two or more monomer molecules_________________?
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A. In a chain without the elimination of water
B. With the elimination of small amount of water
C. Of the same monomer by elimination of small molecules of water
D. None of these
Which of the following is not a polyolefin ?
A. Polystyrene
B. Polypropylene
C. Neoprene
D. None of these
Ion exchange resins are made of____________________?
A. Lucite
B. Sulphonated Bakelite
C. Polystyrene
D. Teflon
Contact lenses for eyes are made of Perspex, which is nothing but_______________?
A. poly-methyl-methacrylate
B. Polystyrene
C. Unsaturated polyester
D. Polypropylene
Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ?
A. Ethylene glycol
B. Stearic acid estors
C. Tricresyl phosphate
D. Esters of phthalic acid
Cross linked polymers formed from bi-and trifunctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer ______________ properties?
A. Thermoplastic
B. Thermosetting
C. Elastometric
D. Brittleness
Polymerisation process in which two or more monomers of chemically different nature take part is called__________________?
A. Copolymerisation
B. Addition polymerisation
C. Chain polymerisation
D. None of these
All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it cannot be used for the production of plastic_______________?
A. Filaments
B. Pipes
C. Buckets
D. Tubings
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