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Polymer Technology

Polymer Technology
Poly Vinyl chloride (PVC) is a __________ material.

Thermosetting
Fibrous
Thermoplastic
Chemically active

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Polymer Technology
Catalyst used in the production of high density polythene by low pressure Ziegler process is

Platinum
Molybdenum
Nickel
Aluminium triethyl activated with TiCl₄

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

Carbon
Magnesium
Thiokol
Alkylated diphenyl amine

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Polymer Technology
The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is

Polyvinyl butyral
Polyvinyl alcohol
PVC
Polyvinyl acetale

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Polymer Technology
Addition of stabiliser during PVC manufacture is done to

Reduce the melt viscosity & glass transition temperature
Improve its elasticity
Improve its impact strength
Prevent its thermal degradation

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Polymer Technology
Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800?

49200
50000
50800
51600

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