Polycaprolactam is____________________?
Polycaprolactam is____________________?
A. Nylon-6
B. Nylon-66
C. Dacron
D. Rayon
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In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of__________________?
In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of__________________?A. Cross linked polystyrene
B. Phenol formaldehyde resins
C. Polyesters
D. PolyamidesGutta percha rubber is_________________?
Gutta percha rubber is_________________?A. Soft & tacky at room temperature
B. An isomer of natural rubber
C. A thermosetting resin
D. Recovered by coagulation of rubber latexCrystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding_________________?
Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding_________________?A. Glycerol
B. Nitro cellulose
C. Camphor
D. None of theseWhich of the following is the most important rubber compounding ingredient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ?
Which of the following is the most important rubber compounding ingredient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ?A. Phosphorous
B. Carbon black
C. e oil
D. RosinMolecular weight of polymers are in the range of__________________?
Molecular weight of polymers are in the range of__________________?A. 10 to 103
B. 102-107
C. 107-109
D. 109-1011The repeating units of PTFE are___________________?
The repeating units of PTFE are___________________?A. Cl2CH-CH3
B. F2 C = CF2
C. F3 C-CF3
D. FClC = CF2