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.Management Sciences
Category: Polymer Technology
Epoxy resin is a polymer containing two or more groups of the bellow fig. is called epoxide group or ethoxyline group. It is a _______________?
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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
Neoprene is chemically known as _________________?
A. Polybutadiene
B. Styrene butadiene rubber (SBR)
C. Polyurethane
D. Poly chloroprene
________________ is produced by polymerisation of chloroprene?
A. Thiokol (a polysulphide rubber)
B. Butyl rubber
C. Neoprene
D. Polyurethane rubber
Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its__________________?
A. Tensile strength
B. Chemical resistance
C. Flexibility
D. All A., B. & C.
Main constituent of natural rubber is_________________?
A. Polystyrene
B. Polyisoprene
C. Polybutadiene
D. Poly chloroprene
Which of the following natural bio polymers are formed as a result of polymerisation of amino-acids ?
A. Starch
B. Cellulose
C. Proteins
D. Nucleic acids
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