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Polymer Technology

Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex ?

Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex ?

A. Ammonium alum
B. Potassium alum
C. Both A. & B.
D. Neither A. nor B.

Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex ? Read More »

Polymer Technology

Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is_________________?

Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is_________________?

A. Chloroethane
B. Chloroprene
C. Isoprene
D. None of these

Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is_________________? Read More »

Polymer Technology

In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for _______________ fibres?

In case of dry sning of polymers, the polymer solution in a volatile solvent is forced through the snerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry sning is used for _______________ fibres?

A. Polythene
B. PVC
C. Rayon
D. Polyvinyl acetate

In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for _______________ fibres? Read More »

Polymer Technology