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Polymer Technology

Polymer Technology
The only natural thermoplastic resin, which is a product of animal life is

Rosin
Shellac
Amber
Copal

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Polymer Technology
Polymerisation process in which two or more monomers of chemically different nature take part is called

Copolymerisation
Addition polymerisation
None of these
Chain polymerisation

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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?

50800
51600
50000
49200

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Polymer Technology
__________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol).

Unsaturated polyester
Amino resins
Alkyd resins
Saturated polyester

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Polymer Technology
Alkyd resin can not be used for making

Plasticiser
Fibres
Film forming materials
Paint & varnish

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Polymer Technology
Thermoplastic resins usually

Permanent setting resins
Remain hard as long as they are hot
Less brittle than thermosetting resins
Can not be reclaimed from waste

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