A. Phosphorous
B. Carbon black
C. e oil
D. Rosin
A. Tensile strength
B. Resistance to organic solvents
C. Tackiness
D. Working temperature range
Vulcanisation of rubber decreases its__________________? Read More »
Polymer Technology A. Decreases with increase in molecular weight
B. Decreases with increase in temperature
C. Increases with increase in temperature
D. Does not vary with temperature rise
Viscosity of a polymer solution or melt _________________? Read More »
Polymer Technology A. Polymer termination step
B. Condensation of siloxane to silicone
C. Initial hydrolysis of silicone monomer
D. None of these
The rate controlling step in the manufacture of silicone rubber is the_________________? Read More »
Polymer Technology A. Hardeners
B. Anti-shrinkage agents
C. Plasticisers
D. Transparency improver
A. In a chain without the elimination of water
B. With the elimination of small amount of water
C. Of the same monomer by elimination of small molecules of water
D. None of these
A. Electrical insulation
B. Toys making
C. Coating and films
D. Packaging
Maximum consumption of polymers is in___________________? Read More »
Polymer Technology A. Unsaturated polyester
B. Alkyd resins
C. Saturated polyester
D. Amino resins
A. Improve its impact strength
B. Improve its elasticity
C. Reduce the melt viscosity & glass transition temperature
D. Prevent its thermal degradation
Addition of stabiliser during PVC manufacture is done to________________? Read More »
Polymer Technology A. Wet tear and bursting strength
B. Folding endurance
C. Wet rub resistance
D. All A., B. & C.
Amino resins are used in paper treatment to improve its__________________? Read More »
Polymer Technology