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Polymer Technology

Polymer Technology
__________ is a thermosetting plastic.

Polystyrene
Bakelite
Polythene
PVC

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Polymer Technology
Diphenylamine is added to rubber to

Valcanise it
Make it non-inflammable
Protect it from deterioration on exposure to air
Make it thermosetting

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Polymer Technology
Alkyd resin e.g., glyptal resin formed by phthalic anhydride and glycerene is not used

For fibre making
For film forming materials
For surface coating of automobiles & air crafts
As plasticiser for PVC & nitrocellulose

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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?

Potassium alum
Neither A nor B
Ammonium alum
Both A & B

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Polymer Technology
Polymethyl methacrylate, which is an acrylic resin, is also called

Plexiglass or lucite
Thiokol
Teflon
Dacron

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Polymer Technology
Which of the following is the most important rubber compounding ingradient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness?

Carbon black
Phosphorous
Pine oil
Rosin

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