A. Butadiene copolymers, Polyamides, Urea-formaldehyde
B. Cellulose derivatives, Polyisoprene, Polyethylene
C. Cellulose derivatives, Polyamides, Polyurethane
D. Polypropylene, Poly vinyl chloride, Silicon
Related Mcqs:
- Dacron (or Treylene) fibres as compared to nylon fibres have_____________________?
A. Better heat & acid resistant properties
B. Poorer resistance to alkalis
C. Poorer dyeability
D. All A., B. and C. - 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?
A. Polythene
B. PVC
C. Rayon
D. Polyvinyl acetate - Melt spinning of polymers involves the forcing of polymer melt through spinnerates (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the _____________ fibres?
A. Acrylic
B. Polyester
C. Nylon 6:6
D. Polypropylene - In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the _____________ fibres?
A. Viscose rayon
B. Acrylic
C. Polyvinyl acetate
D. Saturated polyester - Branched chair polymers as compared to linear polymers have _________________?
A. Higher melting point
B. Higher tensile strength
C. Lower density
D. None of these - In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher ___________________?
A. Densities
B. Melting point
C. Tensile strength
D. Hardness, rigidity & brittleness - Branched chain polymers compared to linear polymers have higher ____________________?
A. Density
B. Tensile strength
C. Melting point
D. Degree of irregularity in atomic packing - 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 synthetic fibres produced from _____________ are known as rayon?
A. Lignin
B. Cellulose
C. Polyamides
D. Ethylene glycol - ______________ fibres are made of polyamides?
A. Dacron
B. Nylon
C. Rayon
D. Orion
