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.Management Sciences
Category: Polymer Technology
Phosphates (e.g., tricresyl, tributyl, tetrabutyl, triphenyl etc.) are added to polymers to act as __________________?
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A. Hardeners
B. Anti-shrinkage agents
C. Plasticisers
D. Transparency improver
Polymethyl methacrylate (PMMA) which is also known as Perspex and is produced by bulk polymerisation of methyl methacrylate is not a ______________ polymer?
A. Thermoplastic
B. Thermosetting
C. Linear
D. Glass like transparent
Polypropylene compared to polythene is___________________?
A. Harder
B. Stronger
C. Lighter
D. All A., B. and C.
Molecular weights of plastics ranges from_______________?
A. 1000 to 5000
B. 5000 to 1000
C. 20000 to 25000
D. 109 to 1011
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the_________________?
A. Hexamethylene diamine and the ring
B. Hexamethylene diamine and the adipic acid
C. Adipic acid and the ring
D. None of these
Epoxy resin is a polymer containing two or more groups of the bellow fig. is called epoxide group or ethoxyline group. It is a _______________?
A. Polyamide & an elastomer
B. Good adhesive
C. Surface coating agent
D. Both B. and C.
Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butadiene rubber) are____________________?
A. 50°C and 3 – 4 kg/cm2
B. 50°C and 1 kgf/cm2
C. 250°C and 10 kgf/cm2
D. 250°C and 1 kgf/cm2
Which of the following has the weakest intermolecular forces ?
A. Polyisoprene
B. Nylon-66
C. Polystyrene
D. Bakelite
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