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- Question
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
Options- A. densities
- B. melting point
- C. tensile strength
- D. hardness, rigidity & brittleness
- Correct Answer
- hardness, rigidity & brittleness
- 1. Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is
Options- A. 7 kgf/cm2 and 70 °C.
- B. 1000 kgf/cm2 and 100°C.
- C. 7 kgf/cm2 and 700°C.
- D. 1 kgf/cm2 (gage) and 70°C. Discuss
- 2. Cross linked polymers are
Options- A. thermoplastic
- B. thermosetting
- C. either (a) or (b)
- D. fibres only Discuss
- 3. Vulcanisation of rubber does not increase its
Options- A. softness
- B. oxidation resistance
- C. weight & strength
- D. elasticity & water solubility Discuss
- 4. The process involved in converting rubber into a thin sheet or coating it on fabric is called
Options- A. extrusion
- B. mastication
- C. calendering
- D. vulcanisation Discuss
- 5. Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.
Options- A. improving the stretchability
- B. dyeing/colouring
- C. detergent solution washing
- D. glycol soaking Discuss
- 6. Nylon-66 is manufactured from
Options- A. adipic acid and hexamenthylene diamine.
- B. caprolactum.
- C. maleic anhydride and hexamethylene diamine.
- D. dimethyl terephthalate (DMT) and ethylene glycol. Discuss
- 7. Cation exchange resins used in water treatment is made from __________ resin.
Options- A. urea formaldehyde
- B. epoxy
- C. amino
- D. phenolic Discuss
- 8. 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.
Options- A. acrylic
- B. polyester
- C. nylon 6:6
- D. polypropylene Discuss
- 9. Which of the following is not a natural polymer?
Options- A. Nucleic acids e.g. RNA and DNA
- B. Polysaccharides
- C. Polyisoprene
- D. Polyurethane Discuss
- 10. Pick out the wrong statement.
Options- A. Addition polymers are generally formed by chain growth polymerisation.
- B. Condensation polymers are generally formed by step growth polymerisation.
- C. Teflon is formed by step growth polymerisation.
- D. Bakelite is formed by step growth polymerisation. Discuss
Polymer Technology problems
Search Results
Correct Answer: 7 kgf/cm2 and 70 °C.
Correct Answer: thermosetting
Correct Answer: softness
Correct Answer: calendering
Correct Answer: detergent solution washing
Correct Answer: adipic acid and hexamenthylene diamine.
Correct Answer: urea formaldehyde
Correct Answer: acrylic
Correct Answer: Polyurethane
Correct Answer: Teflon is formed by step growth polymerisation.
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