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Polymer Technology

Polymer Technology
Paper like thin plastic articles can be produced by

Vacuum thermo forming
Blow moulding
Injection moulding
None of these

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Polymer Technology
__________ tubes are good substitude for human blood vessels onrheart by-pass operation.

Polythene
Polystyrene
Teflon/dacron
PVC

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

Molybdenum
Platinum
Nickel
Aluminium triethyl activated with TiCl₄

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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.

Polypropylene
Polyester
Nylon 6:6
Acrylic

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Polymer Technology
Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is

1000 kgf/cm² and 100°C
1 kgf/cm² (gage) and 70°C
7 kgf/cm² and 70 °C
7 kgf/cm² and 700°C

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Polymer Technology
Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin.

Phenol
Resorcinol
Melamine
Para-cresol

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