Polymer Technology Plastic tubes & pipes are generally made by __________ moulding. Compression Injection Transfer Extrusion Compression Injection Transfer Extrusion ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polycondensation reaction of polymerisation Does not need any catalyst Produces only thermoplastic material Does not produce linear polymers Produces epoxy polymers Does not need any catalyst Produces only thermoplastic material Does not produce linear polymers Produces epoxy polymers ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to Increase its viscosity Protect rubber goods from attack by oxygen & ozone present in the atmosphere Reduce the time of vulcanisation and quantity of vulcanising agent Reduce its viscosity to permit easier processing Increase its viscosity Protect rubber goods from attack by oxygen & ozone present in the atmosphere Reduce the time of vulcanisation and quantity of vulcanising agent Reduce its viscosity to permit easier processing ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Diphenylamine is added to rubber to Make it non-inflammable Protect it from deterioration on exposure to air Make it thermosetting Valcanise it Make it non-inflammable Protect it from deterioration on exposure to air Make it thermosetting Valcanise it ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Styrene which is a monomer for the production of polystyrene, is commercially produced by the Catalytic dehydrogenation of ethyl benzene Fermentation of starch Reacting ethylene oxide with acetal-dehyde Dehydration of ethyl alcohol followed by hydrogenation Catalytic dehydrogenation of ethyl benzene Fermentation of starch Reacting ethylene oxide with acetal-dehyde Dehydration of ethyl alcohol followed by hydrogenation ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Density of high density polythene is about __________ gm/c.c. 0.95 1.18 1.05 0.99 0.95 1.18 1.05 0.99 ANSWER DOWNLOAD EXAMIANS APP
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