Viscosity of a polymer solution or melt _________________?

Byadmin March 7, 2019August 25, 2021

Viscosity of a polymer solution or melt _________________?

A. Decreases with increase in molecular weight
B. Decreases with increase in temperature
C. Increases with increase in temperature
D. Does not vary with temperature rise

Polymer Technology

Polymethyl methacrylate (PMMA) which is also known as Perspex and is produced by bulk polymerisation of methyl methacrylate is not a ______________ polymer?

Polymethyl methacrylate (PMMA) which is also known as Perspex and is produced by bulk polymerisation of methyl methacrylate is not a ______________ polymer?

A. Thermoplastic
B. Thermosetting
C. Linear
D. Glass like transparent

Read More Polymethyl methacrylate (PMMA) which is also known as Perspex and is produced by bulk polymerisation of methyl methacrylate is not a ______________ polymer?
Polymer Technology

Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are__________________?

Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are__________________?

A. 5°C and 1 kgf/cm2
B. – 20°C and 1 kgf/cm2
C. 0°C and 1 kgf/cm2
D. 0°C and 3 kgf/cm2

Read More Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are__________________?
Polymer Technology

Diphenylamine is added to rubber to_________________?

Diphenylamine is added to rubber to_________________?

A. Vulcanise it
B. Protect it from deterioration on exposure to air
C. Make it non-inflammable
D. Make it thermosetting

Read More Diphenylamine is added to rubber to_________________?
Polymer Technology

Cross linked polymers are__________________?

Cross linked polymers are__________________?

A. Thermoplastic
B. Thermosetting
C. Either A. or B.
D. Fibres only

Read More Cross linked polymers are__________________?
Polymer Technology

Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ?

Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ?

A. Ethylene glycol
B. Stearic acid estors
C. Tricresyl phosphate
D. Esters of phthalic acid

Read More Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ?
Polymer Technology

Nylon-66 is manufactured from ____________________?

Nylon-66 is manufactured from ____________________?

A. Adipic acid and Hexamethylene diamine
B. Caprolactam
C. Maleic anhydride and Hexamethylene diamine
D. Dimethyl terephthalate (DMT) and ethylene glycol

Read More Nylon-66 is manufactured from ____________________?

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