Vinyl flooring is done using _____________ sheets?
Vinyl flooring is done using _____________ sheets?
A. Polypropylene
B. PVC
C. Polythene
D. Polyvinyl acetate
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Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is__________________?
Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is__________________?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°CVulcanisation of rubber_____________________?
Vulcanisation of rubber_____________________?A. Decreases its tensile strength
B. Increases its ozone & oxygen reactivity
C. Increases its oil & solvent resistance
D. Converts its plasticity into elasticityPolyvinyl chloride (PVC) ____________________?
Polyvinyl chloride (PVC) ____________________?A. Is produced by Polycondensation reaction
B. Uses either emulsion or suspension polymerisation methods
C. Can be made thermosetting by adding a plasticiser
D. Softening temperature is 200°CIn 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?
In case of wet sning of polymers, the polymer solution is forced through snerates into, a coagulating bath to give a filament form. Wet sning is not used in case of the _____________ fibres?A. Viscose rayon
B. Acrylic
C. Polyvinyl acetate
D. Saturated polyesterWhich of the following is not a natural polymer ?
Which of the following is not a natural polymer ?A. Nucleic acids e.g. RNA and DNA
B. Polysaccharides
C. Polyisoprene
D. PolyurethaneEpoxy resin is____________________?
Epoxy resin is____________________?A. Not used for surface coating
B. A good abrasive
C. An elastomer
D. A polyester