Polymer Technology In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of Polyamides Cross linked polystyrene Polyesters Phenol formaldehyde resins Polyamides Cross linked polystyrene Polyesters Phenol formaldehyde resins ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following is not an elastomer? Nitrile-butadiene None of these Polyisoprene Neoprene Nitrile-butadiene None of these Polyisoprene Neoprene 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. 100 to 150 -20 to 25 50 to 75 250-280 100 to 150 -20 to 25 50 to 75 250-280 ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Addition of stabiliser during PVC manufacture is done to Improve its elasticity Prevent its thermal degradation Improve its impact strength Reduce the melt viscosity & glass transition temperature Improve its elasticity Prevent its thermal degradation Improve its impact strength Reduce the melt viscosity & glass transition temperature ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Properties of a polymer is affected by the Chain length All of these Branching & cross-linking Intermolecular forces Chain length All of these Branching & cross-linking Intermolecular forces ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding None of these Camphor Glycerol Nitro cellulose None of these Camphor Glycerol Nitro cellulose ANSWER DOWNLOAD EXAMIANS APP
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