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Polymer Technology

Polymer Technology
Commercial production of polypropylene employs __________ polymerisation.

Emulsion
Solution
Bulk
Suspension

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Polymer Technology
In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher

Hardness, rigidity & brittleness
Melting point
Tensile strength
Densities

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Polymer Technology
__________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine.

Alkyd
Amino
Epoxy
Phenolic

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Polymer Technology
Thermosplastic materials

Do not soften on application of heat
None of these
Are heavily branched molecules
Are solvent insoluble

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Polymer Technology
Nylon-66 is manufactured from

Dimethyl terephthalate (DMT) and ethylene glycol
Adipic acid and hexamenthylene diamine
Caprolactum
Maleic anhydride and hexamethylene diamine

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

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

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