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 Phenol formaldehyde resins Polyesters Cross linked polystyrene Polyamides Phenol formaldehyde resins Polyesters Cross linked polystyrene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Liners of bags are usually made of Polypropylene Polyesters Polythene PVC Polypropylene Polyesters Polythene PVC ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding None of these Glycerol Nitro cellulose Camphor None of these Glycerol Nitro cellulose Camphor ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Linear polymers are normally Thermosplastic Thermosetting Having extremely high softening point Elastometric Thermosplastic Thermosetting Having extremely high softening point Elastometric ANSWER DOWNLOAD EXAMIANS APP
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 Increase its viscosity Reduce the time of vulcanisation and quantity of vulcanising agent Reduce its viscosity to permit easier processing Protect rubber goods from attack by oxygen & ozone present in the atmosphere Increase its viscosity Reduce the time of vulcanisation and quantity of vulcanising agent ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at 2:1 1:3 3:1 1:2 2:1 1:3 3:1 1:2 ANSWER DOWNLOAD EXAMIANS APP
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