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Polymer Technology

Polymer Technology
Commercial production of polypropylene employs __________ polymerisation.

Bulk
Emulsion
Solution
Suspension

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Polymer Technology
In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is

Polybutadiene
Polypropylene
PVC
Terylene

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Polymer Technology
Alkyd resin e.g., glyptal resin formed by phthalic anhydride and glycerene is not used

For surface coating of automobiles & air crafts
As plasticiser for PVC & nitrocellulose
For film forming materials
For fibre making

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Polymer Technology
Which of the following has the weakest intermolecular forces?

Polystyrene
Nylon-66
Bakelite
Polyisoprene

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Polymer Technology
Which of the following is stretched into fibres?

Bakelite
Unsaturated polyester
Isoprene
Saturated polyester

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Polymer Technology
Silicone resins, which are highly water repellant and has good heat resistance can not be used

As room temperature adhesive
Hydraulic fluid for heat transfer
As grease & lubricant
Resin for lamination

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