A. Soft & tacky at room temperature
B. An isomer of natural rubber
C. A thermosetting resin
D. Recovered by coagulation of rubber latex
A. Are made by addition polymerisation reaction only
B. Contain an epoxy group (fig bellow) at the ends of the polymer
C. Are cross-linked polymers only
D. Use emulsion polymerisation methods
A. Neoprene
B. PVC
C. Polyurethane
D. SBR
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
A. Chloroethane
B. Ethylene dichloride
C. Ethyl chloride
D. Chloroform
A. Protect rubber goods from attack by oxygen & ozone present in the atmosphere
B. Reduce its viscosity to permit easier processing
C. Reduce the time of vulcanisation and quantity of vulcanising agent
D. Increase its viscosity
A. 7 kgf/cm2 and 70 °C
B. 1000 kgf/cm2 and 100°C
C. 7 kgf/cm2 and 700°C
D. 1 kgf/cm2 (gage) and 70°C