Polymer Technology Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature. Nylon Polyacrylonitrile Polyester Polypropylene Nylon Polyacrylonitrile Polyester Polypropylene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6. -20 to 25 250-280 100 to 150 50 to 75 -20 to 25 250-280 100 to 150 50 to 75 ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polymers are Micromolecules Macromolecules Sub-micromolecules None of these Micromolecules Macromolecules Sub-micromolecules None of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polyvinyl chloride (PVC) Uses either emulsion or suspension polymerisation methods Is produced by polycondensation reaction Can be made thermosetting by adding a plasticiser Softening temperature is 200°C Uses either emulsion or suspension polymerisation methods Is produced by polycondensation reaction Can be made thermosetting by adding a plasticiser Softening temperature is 200°C ANSWER DOWNLOAD EXAMIANS APP
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? Esters of phthalic acid Tricresyl phosphate Stearic acid estors Ethylene glycol Esters of phthalic acid Tricresyl phosphate Stearic acid estors Ethylene glycol ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Visco-elastic behaviour exhibited by plastics is a __________ like behaviour. Neither solid nor liquid Solid Liquid Combination of solid & liquid Neither solid nor liquid Solid Liquid Combination of solid & liquid ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS