Polycaprolactam (Nylon – 6) is produced by the condensation polymerisation of caprolactam at 240-280°C in which the conversion of caprolactam is about ______________ percent?
A. 50
B. 75
C. 90
D. 99
Polymer Technology
Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%) ?
Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%) ?
A. Water impermeable cellophane
B. Polythene
C. Cellulose acetate
D. Teflon
The physical state in which polymers exist is___________________?
The physical state in which polymers exist is___________________?
A. Melts & rubber like state
B. Amorphous glassy state
C. Partially crystalline state
D. All A., B. and C.
Alkyd resin is a/an___________________?
Alkyd resin is a/an___________________?
A. Polyamide
B. Polyester
C. Polyolefin
D. Addition polymer
Ion exchange resins are made of____________________?
Ion exchange resins are made of____________________?
A. Lucite
B. Sulphonated Bakelite
C. Polystyrene
D. Teflon
Bristles of tooth brushes are made of_______________?
Bristles of tooth brushes are made of_______________?
A. Nylon-6
B. Nylon-66
C. Polystyrene
D. PVC
Most of the plastics are safe to be used upto a maximum temperature of ______________ °C?
Most of the plastics are safe to be used upto a maximum temperature of ______________ °C?
A. 100
B. 150
C. 350
D. 450
Contact lenses for eyes are made of Perspex, which is nothing but_______________?
Contact lenses for eyes are made of Perspex, which is nothing but_______________?
A. poly-methyl-methacrylate
B. Polystyrene
C. Unsaturated polyester
D. Polypropylene
Which of the following is not a polyolefin ?
Which of the following is not a polyolefin ?
A. Polystyrene
B. Polypropylene
C. Neoprene
D. None of these
Vulcanisation of raw rubber makes it__________________?
Vulcanisation of raw rubber makes it__________________?
A. Soft
B. Less elastic
C. Plastic
D. Tacky