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Polymer Technology

Polymer Technology
Buna-S is also called

SBR
Teflon
Bakelite
Polyurathane

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Polymer Technology
__________ is a natural fibre.

None of these
Nylon-6
Cellulose
Dacron

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Polymer Technology
Bakelite is

Same as polytetra flouro ethylene (PTFE)
An inorganic polymer
Same as thermoset phenol formaldehyde
Not a polymer

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Polymer Technology
Vulcanisation of raw rubber makes it

Soft
Tacky
Plastic
Less elastic

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Polymer Technology
Thermosetting resins/polymers as compared to thermoplastic ones are

More brittle
Soluble in all organic solvents
Formed by addition polymerisation only
Easily reshaped & reused

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Polymer Technology
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.

Polyester
Polypropylene
Nylon 6:6
Acrylic

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