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.

Polypropylene

Nylon 6:6

Polyester

Acrylic

Polypropylene

Nylon 6:6

Polyester

Acrylic

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Polymer Technology
Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the

Tanning of leather

Strengthening of plaster of paris

Electrical insulation purpose

Decorative laminates

Tanning of leather

Strengthening of plaster of paris

Electrical insulation purpose

Decorative laminates

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Polymer Technology
Amino resins are used in paper treatment to improve its

Folding endurance

Wet rub resistance

All of these

Wet tear and bursting strength

Folding endurance

Wet rub resistance

All of these

Wet tear and bursting strength

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Polymer Technology
Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to

Reduce its viscosity to permit easier processing

Protect rubber goods from attack by oxygen & ozone present in the atmosphere

Reduce the time of vulcanisation and quantity of vulcanising agent

Increase its viscosity

Reduce its viscosity to permit easier processing

Protect rubber goods from attack by oxygen & ozone present in the atmosphere

Reduce the time of vulcanisation and quantity of vulcanising agent

Increase its viscosity

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Polymer Technology
Vulcanisation of rubber does not increase its

Oxidation resistance

Softness

Weight & strength

Elasticity & water solubility

Oxidation resistance

Softness

Weight & strength

Elasticity & water solubility

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Polymer Technology
Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800?

50000

51600

50800

49200

50000

51600

50800

49200

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Polymer Technology

Polymer Technology Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the

Polymer Technology Amino resins are used in paper treatment to improve its

Polymer Technology Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to

Polymer Technology Vulcanisation of rubber does not increase its

Polymer Technology Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800?

Polymer Technology
Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the

Polymer Technology
Amino resins are used in paper treatment to improve its

Polymer Technology
Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to

Polymer Technology
Vulcanisation of rubber does not increase its

Polymer Technology
Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800?