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.Management Sciences
Category: Polymer Technology
Which of the following low molecular weight (<104), soft & waxy polymer is used in „chewing gum‟ ?
A. Cellulose acetate
B. Polyvinyl acetate
C. Thiokol
D. PVC
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.
Poly-methyl-methacrylate (PMMA) is known as_______________?
A. Bakelite
B. Teflon
C. Perspex
D. Nylon-6
Diphenylamine is added to rubber to_________________?
A. Vulcanise it
B. Protect it from deterioration on exposure to air
C. Make it non-inflammable
D. Make it thermosetting
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
Polyvinyl chloride (PVC) is __________________?
A. A thermosetting material
B. A condensation polymerisation product
C. Made by employing emulsion polymerisation
D. None of these
Condensation polymerisation of formaldehyde with _____________ does not produce phenolic resin?
A. Resorcinol
B. Phenol
C. Para-cresol
D. Melamine
Which of the following types of polymers has the strongest inter particle forces ?
A. Elastomers
B. Fibres
C. Thermoplastics
D. Thermosetting polymers
Polycondensation reaction of polymerisation ___________________?
A. Does not produce linear polymers
B. Produces only thermoplastic material
C. Produces epoxy polymers
D. Does not need any catalyst
Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but____________________?
A. Polyacrylonitrile
B. Polyamide
C. Saturated polyester
D. Alkyd resin
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