Polymer Technology

31. Addition polymerisation is not involved in the manufacture of

1. Low density polythene
2. Poly vinyl chloride
3. Polystyrene
4. Polyhexamethylene adipamide

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32. Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by _________, which decompose to give free radicals.

1. Organic peroxides
2. Sulphuric acid
3. Hydrofluoric acid
4. None of these

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33. Adipic acid is an intermediate in the manufacture of

1. Perspex
2. Nylon-66
3. Polystyrene
4. Bakelite

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34. Alkyd resin cannot be used for making

1. Plasticiser
2. Paint & varnish
3. Fibres
4. Film forming materials

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35. Alkyd resin e.g., glyptal resin formed by Phthalic anhydride and glycerine is not used

1. For surface coating of automobiles & air crafts
2. For fibre making
3. As plasticiser for PVC & nitrocellulose
4. For film forming materials

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36. Alkyd resin is a/an

1. Polyamide
2. Polyester
3. Polyolefin
4. Addition polymer

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37. All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it cannot be used for the production of plastic

1. Filaments
2. Pipes
3. Buckets
4. Tubings

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38. Amino resins are used in paper treatment to improve its

1. Wet tear and bursting strength
2. Folding endurance
3. Wet rub resistance
4. All (A), (B) & (C)

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39. Antioxidants are added to rubber to protect it from the attack of light, heat & atmospheric ozone. Which of the following is an antioxidant used in rubber?

1. Carbon
2. Alkylated diphenyl amine
3. Thiokol
4. Magnesium

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40. Automobile steering wheels are normally made of

1. Cellulose acetate
2. Cellulose nitrate
3. PVC
4. High density polythene

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