Catalyst used in the production of high density polythene by low pressure Ziegle

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Question
Catalyst used in the production of high density polythene by low pressure Ziegler process is
Options
A. aluminium triethyl activated with TiCl₄
B. platinum
C. molybdenum
D. Nickel

Correct Answer

aluminium triethyl activated with TiCl₄

Polymer Technology problems

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2. Epoxy resins (i.e., epoxide polymers)
Options
A. are made by addition polymerisation reaction only.
B. contain an epoxy group ( ) at the ends of the polymer.
C. are cross-linked polymers only.
D. use emulsion polymerisation methods.

3. All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic
Options
A. filaments
B. pipes
C. buckets
D. tubings

4. Elastomers are
Options
A. thermosetting material.
B. exemplified by protein derivatives.
C. having high flexural strength.
D. having very high tensile strength and heat resistance.

7. Epoxy resin is a polymer containing two or more groups called epoxide group or ethoxyline group. It is a
Options
A. polyamide & an elastomer.
B. good adhesive.
C. surface coating agent.
D. both (b) and (c).

9. Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its
Options
A. tensile strength
B. chemical resistance
C. flexibility
D. all (a), (b) & (c)

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