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.

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.

Acrylic

Nylon 6:6

Polyester

Polypropylene

Acrylic

Nylon 6:6

Polyester

Polypropylene

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Polymer Technology
Rayon is a __________ fibre.

Natural

Polyester

Cellulosic

Polyamide

Natural

Polyester

Cellulosic

Polyamide

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Polymer Technology
Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is

None of these

Chlorophrene

Chloroethane

Isoprene

None of these

Chlorophrene

Chloroethane

Isoprene

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Polymer Technology
In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.

Polythene

Polyvinyl acetate

PVC

Rayon

Polythene

Polyvinyl acetate

PVC

Rayon

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Polymer Technology
Dacron is a

None of these

Thermosetting material

Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol

Condensation polymerisation product of hexamethylene diamine and adipic acid

None of these

Thermosetting material

Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol

Condensation polymerisation product of hexamethylene diamine and adipic acid

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Polymer Technology
Polyvinyl chloride (PVC)

Uses either emulsion or suspension polymerisation methods

Can be made thermosetting by adding a plasticiser

Is produced by polycondensation reaction

Softening temperature is 200°C

Uses either emulsion or suspension polymerisation methods

Can be made thermosetting by adding a plasticiser

Is produced by polycondensation reaction

Softening temperature is 200°C

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Polymer Technology

Polymer Technology Rayon is a __________ fibre.

Polymer Technology Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is

Polymer Technology In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.

Polymer Technology Dacron is a

Polymer Technology Polyvinyl chloride (PVC)

Polymer Technology
Rayon is a __________ fibre.

Polymer Technology
Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is

Polymer Technology
In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.

Polymer Technology
Dacron is a

Polymer Technology
Polyvinyl chloride (PVC)